united states department of the interior geological … · 2010. 12. 15. · united states...

UNITED STATES DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

THREE-COMPONENT DIGITAL VELOCITY AND ACCELERATION RECORDINGS

MADE IN CONJUNCTION WITH THE PACE REFRACTION EXPERIMENT

(NOVEMBER 1985)

edited by

L. Wennerberg U.S. Geological Survey

OPEN-FILE REPORT 86-387

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature.

CONTENTS

Page No.

ABSTRACT....................................................................... i

INTRODUCTION

R. Borcherdt, G. Fuis, W. Mooney. ............................................. 1

INSTRUMENTATION

J. Sena, R. Warrick, R. Borcherdt, C. Dietel

J. Gibbs, and G. Maxwell ....................................................... 2

SITE SELECTION AND INSTRUMENTATION CONFIGURATIONS

R. Borcherdt, G. Fuis, W. Mooney,

L. Wennerberg, E. Sembera, J. Gibbs, and C. Dietel ............................. 5

VELOCITY AND ACCELERATION TIME HISTORIES

L. Wennerberg, E. Sembera, R. Borcherdt, J. Gibbs, C. Dietel

J. Watson, E. Cranswick ....................................................... 9

CALIBRATION SPECTRA

L. Wennerberg and R. Borcherdt ............................................... 11

ACKNOWLEDGMENTS

REFERENCES CITED

Figure 1: GEOS recording systemFigure 2: Design characteristics of GEOS recordersFigure 3: Map of shots and station locations

Table 1: Master shot listTable 2: Station locations, instruments and instrument recording parametersTable 3: First deployment, station azimuths and distancesTable 4: Second deployment, station azimuths and distancesTable 5: Third deployment, station azimuths and distancesTable 6: Maximum observed accelerations

APPENDIX A: Figures: Velocity records

INTRODUCTION

As part of the Pacific-Arizona Crustal Experiment (PACE; Howard, 1986), a seismic-

refraction experiment was conducted in western Arizona and southeastern California.

PACE is a multidisciplinary effort to understand the crust of the southwestern U.S. Cordillera

along a transect from the southern California borderland to the Colorado Plateau. The

data reported here were collected in conjunction with the first seismic-refraction experi

ment of PACE, consisting of two perpendicular profiles centered on the Whipple Mountains

metamorphic core complex in the Colorado Desert of eastern California. Preliminary re

sults of the seismic-refraction experiment are reported by Fuis and others (1985).

This report describes only the three-component seismic data recorded on portable

broadband digital recorders (GEOS; Borcherdt et a/., 1985). The vertical-component

data recorded on portable analog recorders (Healy and others, 1982) will be described in

forthcoming reports. This report provides analog copies of the digital recordings obtained

from velocity transducers and accelerometers for each of the sources detonated during

these experiments. Complete response curves are provided for each GEOS system for each

deployment. Digital copies of the data are available on request.

Scientific objectives for this experiment with GEOS include shear-wave velocity

structure and structure of the crust-mantle interface, especially as it can be inferred

from near- and post-critical reflection data. A study of near-critical reflection data is

stimulated by laboratory evidence and recent theoretical work (Brekhovskikh, 1960; Decker

and Richardson; 1969, 1972; Borcherdt and Wennerberg, 1985; Borcherdt, Glassmoyer, and

Wennerberg, 1986). This work shows that the characteristics of low-loss anelastic body

waves near critical angles are distinct from those that would be predicted on the basis

of elasticity or on the basis of one-dimensional anelastic models. These distinctions have

proved useful in the laboratory for measurement of material properties, especially intrinsic

absorption. The wide-angle three-component reflection data should provide information

on the structure of the crust-mantle interface as well as an opportunity to examine recently

predicted characteristics of post-critical reflections.

Other objectives for this experiment include: assessment of ground motion severity

near shot points and an evaluation of instrument performance characteristics for seismic-

refraction experiments. For locations near shot points the GEOS systems were set as

six-channel systems with two sets of three-component transducers. This configuration

permitted on-scale strong-motion records to be obtained for all sources at each GEOS

location. The experiments also provided an opportunity to evaluate design features of the

GEOS in the field. Although the system was designed explicitly for a variety of active and

passive seismic experiments, including seismic refraction, these experiments provided the

first opportunity to evaluate these features for a complete seismic-refraction experiment

using arrays of 11 and 12 systems (66-72 channels).

INSTRUMENTATION

Data presented in this report were recorded, using General Earthquake Observation

Systems (GEOS). A detailed description of the systems is provided by Borcherdt et a/.,

1985. A brief summary is provided of recording and playback system characteristics of

interest for this report. Recording system parameters chosen for this experiment are

provided in the next chapter.

Recording System

The GEOS recording system was developed by the U.S. Geological Survey for use in a

wide variety of active and passive seismic experiments. The digital data acquisition system

operates under control of a central microcomputer, which permits simple adaptation of the

system in the field to a variety of experiments; including, seismic refraction studies, near-

source high-frequency studies of strong motion, teleseismic earth structure studies, studies

of earth tidal strains, and free oscillation studies. Versatility in system application is

achieved by isolation of the appropriate data acquisition functions on hardware modules

controlled with a single microprocessor via a general computer bus. CMOS hardware

components are utilized to reduce quiescent power consumption to less than two watts for

use of the system as either a portable recorder in remote locations or in an observatory

setting with inexpensive backup power sources. The GEOS together with two sets of three-

component sensors (force-balance accelerometer, velocity transducer) and ferrite WWVB

antenna was used at the station locations near shot points as shown in Figure 1 (see

Borcherdt et a/., 1985 for hardware modules comprising the system).

The signal conditioning module for the GEOS has six input channels, selectable under

software control, permitting acquisition of seismic signals ranging in amplitude from a few

nanometers of seismic background noise to 2 g in acceleration for ground motions near large

events. The analog-to-digital conversion module is equipped with a 16-bit CMOS analog-

to-digital converter which affords 96 dB of linear dynamic range or signal resolution; this,

together with two sets of sensors, implies an effective system dynamic range of about 180

dB. A data buffer with direct memory access capabilities allows for maximum throughput

rates of 1200 sps. With sampling rates of any integral quotient of 1200, broad and variable

system bandwidth ranging from (10~ 5 6x 102 Hz) is achieved allowing the use of recorders

with a wide variety of sensor types.

Modern high-density (1600-6400 bpi) compact tape cartridges offer large data storage

capacities (1.25-25 Mbyte) in ANSI standard format to facilitate data accessibility via

minicomputer systems. Read capabilities of cartridge tape recorders are utilized to

allow recording parameters and system operational software to be changed automatically.

Installation of an expanded data buffer module allows the system to act as a solid-state or

a dual-media recorder. Systems equipped with modems can be utilized to transmit data

via telecommunications to a central data processing laboratory.

Microprocessor control of time-standard provides the capability to synchronize

internal clock via internal receivers (such as WWVB and satellite), external master clock,

or conventional digital clocks. Microprocessor control of internal receivers permits systems

on command to determine time corrections with respect to external standard. This

capability permits especially accurate correction for conventional drift of internal clocks.

Accurate in situ calibration of system components improves data accuracy and permits

on-site evaluation of potential system performance malfunctions. The calibration module

currently implemented in the GEOS permits calibration of three types of sensors and the

signal-conditioning module under software control of the CPU. Calibration capabilities for

sensors include velocity transducers with and without calibration coils and force-balance

accelerometers. In the case of the velocity transducers, a dc voltage, derived under CPU

control for appropriate gain setting from the D/A converter, is applied to either the

main or calibration coil of the transducer for a software-selectable time interval. Voltage

termination corresponds to an applied step function in acceleration to the sensor mass

with the resultant signal determining relative calibration. In the case of force-balance

accelerometers ±12 volts are applied to the damped and undamped control lines. The

signal-conditioning module is calibrated using impulse of one sample duration and an

alternating dc voltage derived and applied under software control to the amplifiers while

the sensors are disconnected via appropriate relays.

Using a 32-character alphanumeric display under control of the microcomputer makes

for convenient system set-up and the flexibility to modify the system in the field for a

wide variety of applications. English-language messages to the operator, executed in an

interactive mode, reduce operator field set-up errors. A complete record of recording

system parameters is recorded on each tape together with calibration signals for both

the sensor and the recorders. These records assure rapid and accurate interpretation via

computer of signals, both in the field and in the laboratory.

Flexibility to modify the system to incorporate future improvements in technology

is achieved using a structured software architecture and modular hardware components-

Incorporation of new hardware modules is accomplished in a straightforward manner by

replacing appropriate modules and corresponding segments of controlling software.

The system response designed for seismic refraction applications was intended to allow

broadband signals (1-200 Hz) to be recorded on scale at as high a resolution as permitted by

seismic background noise levels. The amplitude response of the recording system, together

with that for two types of sensors frequently used is shown in Figure 2. Response curves

determined from signals recorded at each station location are described in a subsequent

chapter.

Data Playback System

The read and write capabilities of the mass-storage module, together with the D/A

conversion module, permits the GEOS to be used as an analog as well as digital (via RS-

232) playback system in the field. Visual inspection of digitally recorded data is useful

for determining instrument performance, evaluation of recording parameters, evaluation

of environmental factors (e.g., local noise sources, etc.). RS-232 capabilities of data

playback unit and ANSI-standard tape cartridges permit playback of digital time series

on minicomputer systems in the field or laboratory. Digital playback of data is generally

performed using an ANSI-standard serpentine tape reader as a peripheral to minicomputer

systems in the laboratory. Deployment of minicomputer digital playback systems in the

field is generally most feasible for large-scale high-data volume experiments.

For these experiments only analog playback capability was utilized in the field. Analog

playbacks on light-sensitive paper were utilized in the field to identify seismic events,

trigger parameters, and evaluate instrument performance. Digital playback of the data

was conducted with a Tanberg serpentine tape drive attached to the PDF 11/70 at the

National Strong Motion Data Center in Menlo Park, using a variety of software packages,

developed in large part by G. Maxwell, E. Cranswick, and C. Mueller.

SITE SELECTION/INSTRUMENT CONFIGURATION AND EVALUATION

Locations for the seismic refraction profiles are shown in Figure 3. Information

regarding shot points for the profiles is provided in Table 1. Sites along these profiles

were chosen for the GEOS recorders to provide near- and post-critical reflection data from

the crust-mantle interface. The instruments were colocated with some of the sites used

to record vertical component data on the U.S.G.S. cassette recorders. Portions of the

profiles occupied by GEOS also overlapped the near-vertical reflection profiles recorded by

U.C. Santa Barbara. The locations for each of the GEOS recorders are shown in Figures

3 and 4. Station coordinates and pertinent recording parameters for each of the three

separate deployments of the instrumentation are tabulated (Table 2).

Each of the shots detonated during the experiment were recorded on the GEOS set to

record in the pre-set time mode. The systems were programmed to automatically record

during time intervals pre-established for detonation of the various shot points. Operation

in this mode resulted in all shot points being recorded at each station with no exceptions.

Timing at each of the stations was achieved using the capability of the recorders to

synchronize to WWVB. Timing corrections were recorded at selectable intervals during the

24-48 hr. deployment periods to provide a timing accuracy of generally less than 5 ms. A

check of ten systems on the first deployment and a spot check of systems thereafter with an

external master clock confirmed this accuracy. In comparison, recorders without remote

correction capabilities yield timing accuracies of 40-80 ms over a 24-48 hour interval,

using comparable clocks. Measurement of clock drift rate and interpolation has been used

in some cases to reduce uncertainties encountered when remote correction capabilities are

not available, but they are often difficult to implement in large-scale field experiments.

In anticipation of recording a wide range in signal amplitudes ranging from seismic

background noise to more than 1 g in acceleration near the shot points, two different

types of sensors were used. For those sites near the shot points, the GEOS systems

were set as six-channel systems. These systems were used to simultaneously record the

output of both force-balance accelerometers and velocity transducers. The gain settings

for the accelerometers were estimated at the various sites based on distance and size of the

explosion (see Table 2).

For those sites more than 3 km from the shot points, the GEOS were set as three-

channel systems to record the output of L-22 velocity transducers. These configurations of

the systems permitted the signals from all sources to be recorded on-scale at each site and

at maximum signal resolution relative to seismic background noise levels. By recording

the output of each of the velocity transducers at 60 dB gain, the minimum level of signal

resolution was determined by seismic background noise and the upper limit by a clipping

level of the A/D module. This gain setting allowed seismic radiation fields for all shot

points at a distance of more than 3 km to be detected and recorded on-scale.

Sampling rates for all but one of the locations were chosen at 200 sps per channel

with an anti-aliasing high-cut filter selected at 50 Hz (for a resultant Nyquist frequency

of 100 Hz). One location (station 379) was operated at 400 sps and 100 Hz anti-aliasing

high-cut filter. The sampling rate of 200 sps/channel resulted in an approximate 45-

minute continuous record capacity per cartridge tape for the systems used as three-channel

systems.

Automatic self-calibration capabilities of the GEOS permitted calibration signals for

both the sensor-recording system and the recording system without sensors to be recorded

at each station location. Calibration signals for the systems set as three-channel systems

were recorded at both 36 and 54 dB gain levels. The gain levels used to calibrate the

accelerometer channels were those used to record the data (see Table 2). As calibration

signals were recorded for each GEOS deployment location, a complete evaluation of sensor

and recording system response is feasible for these locations. An evaluation of system

response for the cassette recorders and those used by U.C. Santa Barbara can be persued

at locations of cosited instrumentation using simultaneously recorded seismic signals.

In regards to an evaluation of seismic refraction design goals for the GEOS,

improvements in regard to deployment procedures were recognized, but no fundamental

changes in software or hardware were found to be needed for routine use of the system

on seismic-refraction experiments. Eleven systems were utilized for each of the first two

deployments and twelve systems for the third. For each deployment the systems were

required to record a total of 39 channels (see Table 2). Of this total, three of the channels

failed on each of the first two profiles. With the exception of these malfunctions all thirty

shots were recorded on the remaining channels. The percentage of channels operating

correctly throughout the experiment was 95%. The exceptionally high data return for

the first field deployment/test of the GEOS for seismic refraction studies confirms the

initial design goals of the system for this particular application. In addition to instrument

reliability, a large part of the success of the experiment is attributable to the competent

execution of a vast array of complicated logistics by an experienced crew coordinated by

E. Criley, G. Fuis, and W. Mooney (not necessarily in that order).

Several aspects of the deployment procedures were found to be in need of improvement.

These included equipping field vehicles with instrument carrying racks and battery charging

capabilities. Implementing these improvements would permit the GEOS to be deployed

without external batteries and all record parameters to be preprogrammed at the field

office. Significant reductions in size and weight of GEOS carrying cases (shipping boxes)

also would facilitate frequent changes in instrument locations often required in refraction

studies.

The GEOS architecture represents a general framework from which a variety of special-

purpose data acquisition systems can be developed. Configuration of special-purpose or

limited application systems may be practical, provided resources (financial and personnel

are available for development, construction and maintenance). As the GEOS was developed

for application in a variety of passive and active seismic experiments, it is of interest to

consider packaging changes to the GEOS that might improve its usefulness for crustal

imaging studies, but decrease applicability for other applications.

Desirable system attributes for crustal imaging are small size and ease in operation.

A configuration of GEOS currently being implemented is that of extending the data buffer

module to near 1 Mbyte. This extension, which is easily implemented by adding memory

to the data buffer module and changes in corresponding software modules, would allow the

system to be used without the tape cartridge and corresponding controller modules. This

configuration would allow reductions in size and weight of the system. Further reductions

can be achieved easily by reducing the number of input channels by simply removing

corresponding signal conditioning cards. This would allow the system to be packaged in a

container not exceeding 8 x 9 x 13 inches. Weight of the system would be reduced to less

than 15 Ib.

Utilization of the expanded data buffer as a memory board for mass data storage

offers the advantage of increasing the operating-temperature range over that imposed by

the characteristics of magnetic tape. Implementation of such a board in some systems is

planned to allow use of the GEOS in cold environments, such as Alaska. However, these

proposed changes cannot be implemented without sacrificing beneficial attributes of the

system for other applications. Utilization of the memory board reduces data capacity, data

accessibility, and data transportability. Decrease in the number of channels can reduce the

effective dynamic range and the usefulness of the system for studies requiring two types of

three-component sensors, such as aftershock studies. Use of external batteries and external

CPU for operational-parameter change eliminates the self-containment attribute of the

systems and implies that full capability to reset the systems in the field would no longer

involve merely selection of menu mode via the field-data-acquisition system. Nonetheless,

repeated use of a large number of units for seismic-refraction experiments could justify

modifying the modules to produce a subset of the GEOS for dedicated refraction use.

Fortunately, the microcomputer, together with modular hardware components, provides a

8

general framework from which special systems with emphasis on particular attributes can

be easily made.

VELOCITY AND ACCELERATION TIME HISTORIES

Time histories corresponding to the three components of ground motion detected

at each location from each of the thirty shots detonated during the experiments are

shown in Appendices A and B. Those time histories, termed "velocity" (Appendix A),

correspond to signals detected using three-component velocity transducers (L-22; Mark

Products); those termed "acceleration" (Appendix B), correspond to signals detected

using three-component force-balance accelerometers (FBA-13; Kinemtrics). The analog

time histories were derived using digital playback software developed by G. Maxwell and

graphics software developed by E. Cranswick and C. Mueller. Conversion of data format to

that used for the cassette recorder by Mooney et at. has been implemented by W. Kohler,

for use in joint interpretation of the data sets collected on both types of recorders.

Velocity Time Histories

The velocity time histories (Appendix A) are presented in a record section format,

with each section showing one of the three components of motion recorded from each shot.

The record sections are arranged in groups corresponding to distinct shots. These groups

are arranged in chronological order according to shot time. Each group is comprised of

two sections. The figures in the first section of each group (containing usually three,

occasianally six figures) show analog traces of record sections six seconds in length as

recorded for each of the three components of motion. The last three figures of the group

show the corresponding traces plotted for thirty seconds. For each shot the figures are

labeled by a capital letter, a number, and a lower-case letter in parentheses (e.g., Figure

Al(a)). The first letter refers to Appendix A, the number refers to the shot number listed

in the shot schedule, Table 1. The lower-case letters distinguish figures within the group

corresponding to each shot.

The horizontal sensors were oriented parallel with and perpendicular, respectively to

the line of deployment. Orientation of the sensors, determined using a Brunton compass,

is given in the figure captions. Actual shot-station azimuths and distances are given in

Tables 3, 4 and 5. Additional instrument parameters are listed in Table 2.

In the first section of figures for a given shot, consisting of six-second records, traces

are displayed with site number at the top and a range scale indicating distance from the

shot point to the site at the bottom. Amplitudes are normalized to the maximum in the

trace. Times are reduced using 6 km/sec. The shot time is indicated at the top of the

figure in GMT. The sole exception to this format is shot number 25, a fan shot from shot

point 11 into the third deployment. For this shot, the six-second recordings are presented

in the same format as the 30-second recordings.

The last three figures for a given shot are the 30-second recordings. The traces in these

figures are evenly spaced on the page in the same relative position as the instruments had

on the deployment line. Since the stations were quite evenly spaced, the format looks

similar to that for which the traces are spaced according to distance measured from the

shot point. The traces are again normalized to the maximum amplitude. For all traces

the zero-to-peak amplitude is indicated by the length of the arrow in the heading above

the traces. The bottom of each trace is labeled with the maximum digital counts in the

trace, thus allowing a comparison of relative amplitudes from site to site. A conversion

factor of approximately 6 x 10~ 7 converts digital counts to ground motion in cm/sec for

the gain setting used in all these recordings. Times start from the GMT shown in the

heading. Instrument timing was determined by synchronizing internal clocks to WWVB

radio signals. Spot checks were made with a master clock and it was found that the

accuracy of the relative timing was better than 5 msec, except for station 300 where no

time was available. The times indicated for that station are best guesses interpolated from

surrounding stations.

The thirty-second record sections show several interesting features of the recorded

data set that are not apparent in the more conventional and shorter record sections. They

sometimes show late arrivals with amplitudes comparable to those of the first arrivals

(e.g., see Figures A3d and A18e) and are useful for identification of surface waves (e.g.,

see Figure A26g).

The record sections corresponding to each of the components of horizontal motion

10

show that for many of the shots, energy recorded from the horizontal sensors was nearly

comparable or in some cases larger than that recorded from the vertical sensors. The

horizontal data is expected to assist in phase identification, especially converted phases,

and to be useful for inferring shear-wave velocity structure.

Acceleration Time Histories

Near-shot accelerograms recorded on FBAs co-located with velocity sensors are

presented in chronological order in Appendix B. A brief summary of the peak accelerations

recorded is tabulated with shot sizes and shot-receiver distances in Table 6.

The largest acceleration recorded was in excess of one g on the vertical component at

station 166 which was within 100m of a 4000lb shot. The peak accelerations were found

to fall off rapidly with distance from the shot point and to scale roughly linearly with shot

size as shown in Table 6.

There are five groups of accelerograms corresponding to the five shots that were near

enough to the sensors to be recorded. Each figure shows the three components recorded

at a particular station for a given shot. Instrument parameters are given in Table 2. As

with the velocity sensors, the FBAs were placed with the horizontal components parallel

with and perpendicular to the deployment line. Azimuths of the horizontal components

are given in the figures next to the traces in the form 090/AZI, where AZI is the three-digit

azimuth. Actual shot-station azimuths and distances are given in Tables 3, 4 and 5.

IN SITU CALIBRATION OF INSTRUMENTATION

Calibration signals for the sensors and the recording equipment were recorded for each

deployment location. These signals, automatically generated by GEOS, provide a basis

for accurate inference of actual ground motion as recorded at the GEOS locations. They

also allow an estimate of differences in relative response for the cassette-recorder systems

colocated by Fuis et al. (1986) and the U.C. Santa Barbara instrumentation deployed by

Malin et al. (1986).

Fourier amplitude spectra computed from the calibration time histories recorded at

each field location are shown for the velocity transducer-recording system configuration

11

(Appendix C), the force-balance accelerometer-recording system configuration (Appendix

D) and the recording system independent of the sensors (Appendixes C and D). The

calibration signals for the velocity transducers were recorded at 54 dB gain and those for

the force-balance accelerometers at the gains given in Table 2.

Velocity Channels

Two signals, generated automatically by GEOS, were utilized as calibration for the

data recorded on the velocity transducers. Termination of a known DC voltage applied to

the main coil was used as a calibration signal for the complete sensor-recording system.

An impulse voltage applied at the input of the recording system was used to provide a

calibration signal for the recording system independent of the sensors. Utilization of both

calibration signals allows the system response for the recording system to be estimated

throughout the selected bandwidth and dynamic range of the chosen detection-recording

system configuration.

The output signal recorded as a result of the termination in DC voltage to the sensor

coil is rich in low-frequency content. This input signal simulates a step-function in ground

acceleration applied to the mass of the seismometer. As the derivative of this input function

can be approximated by a delta function, the unit impulse response of the complete sensor-

recording system to ground velocity can be estimated from the Fourier transform of the

recorded time history multiplied by the square of angular frequency. Examples of the

Fourier amplitude spectra computed for each deployment location are shown for each of

the velocity transducer channels in the left-hand column of each figure in Appendix C.

These spectra emphasize that the recorded output signal is rich in low-frequency content

and are most useful for estimating the unit impulse response to ground velocity for the

sensor-recording system combination up to a high-frequency limit imposed by the corner

of the selected anti-aliasing filter and seismic background noise levels.

The Fourier amplitude spectra computed from the output signal generated by the

impulse in voltage applied at the input of the recording system is shown for each channel

in the right-hand column of each figure in Appendix C. These spectra provide an estimate

for the amplitude response of the recording system to ground velocity. As the input signal

12

and resulting output signal are especially rich in high frequencies the computed spectra

are most useful for estimating the response of the recording system for frequencies greater

than some low-frequency limit imposed by the relative strength of the applied impulse

voltage for the selected gain setting relative to instrument noise levels.

Utilization of the information contained in each of the recorded calibration signals

permits a rather detailed estimate of instrumentation response to be calculated for each

deployment location. Such estimates can be used to automatically correct data recorded

on GEOS for instrumentation response. Further analysis in this report shall be limited to

general comments on instrumentation performance.

Inspection of the computed calibration curves for the first deployment (Figures Cl

through CIO) shows that the response of the recording systems (GEOS) (right-hand column

of each figure) was remarkably consistent. Minor variations in the amplification level

and the fall-off characteristics for the anti-aliasing filters are apparent. Knowledge of the

amplitude of the applied delta function in voltage as tabulated for each GEOS system

would allow correction for these variations. One channel (H = 90; Figure C7) shows an

anomalous response near the corner of the anti-aliasing filter.

Comparison of the curves computed to estimate the sensor-recording system response

(left-hand column; Figures C1-C10) for the first deployment shows larger variations

especially for frequencies less than the natural frequency of the sensors (nominally 2 Hz).

The response of the sensor used at station 162 (sensor #201, see Table 2) suggests that each

component of the sensor was performing improperly. Irregularities in the response curves

near the corner frequency of the anti-aliasing filters can be attributed to high seismic

background noise levels at the time the calibration signals were recorded. Inspection

of the calibration curves computed for the second and third deployments (Figures Cll

through C19 and Figures CIO through C30, respectively) shows upon reference to Table

2 that sensor number 201 consistently showed evidence of malfunction on at least one

horizontal component and GEOS recording unit number 26 consistently showed anomalous

response near the anti-aliasing filter corner on channel 6. Other than these apparent partial

malfunctions sensor 197 deployed at station number 214 showed a anomalous calibration

for the H = 90 component, suggesting that possibly the sensor was not properly leveled at

13

time of deployment

Acceleration Channels

Two signals, generated by GEOS, were utilized as calibrations for the data recorded

from the force-balance accelerometers (FBA). The output signal generated as the result of

the termination of the application of ±12 v to the damped and undamped central lines for

the FBA simulates a step function in ground acceleration applied to the FBA which can

be used to estimate the response of the sensor-recorder system. An impulse in voltage,

applied to the input of the GEOS, provides a calibration signal for the recording system

independent of the sensor.

The effect of applying ±12 v to the damped and undamped central lines is to set a

non-zero reference voltage for the servo-amplifier of the FBA, hence forcing an offset of the

accelerometer mass. Resetting to zero simulates a step in acceleration. As the derivative

of this input function approximates a delta function, the unit impulse response of the

recording system to ground acceleration can be estimated from the Fourier transform of the

recorded time history multiplied by angular frequency. Examples of the Fourier amplitude

spectra computed for each deployment location for the FBAs are shown in the left-hand

columns of each figure in Appendix D. These spectra show that the recorded output signal

is richest in low-frequency content and consequently most useful for estimating the unit

impulse response of the FBA-recording system to frequencies less than some high-frequency

limit imposed by the corner of the anti-aliasing filter and noise levels. Comparison of the

spectra computed for each FBA location shows that the responses are extremely similar

with the exception of station 234. The apparent difference in the computed spectra is

attributable to the GEOS recording configuration chosen by operator when the system

was deployed. This GEOS operated at this location was set to record at 100 sps with 50

Hz anti-aliasing filters as opposed to 200 sps chosen for the other recording sites.

The Fourier amplitude spectra computed from the output signal generated by the

impulse in voltage applied at the recording system is shown for each channel in the

right-hand column of each figure in Appendix D. These spectra show that the computed

responses are much more contaminated by noise than were those computed for the velocity

14

channels. This contamination is due to the low-voltage level applied at the input for

the lower gain levels used for the FBA channels. In situ calibrations for the recording

systems comparable to those shown for the velocity transducer channels could have been

obtained by setting the gain levels for all channels to those used for the FBAs. This noise

contamination does not indicate a system malfunction, but instead the need to improve

field procedures.

ACKNOWLEDGMENTS

The data set reported for this experiment represents the combined efforts of several

individuals, as indicated in part by the distributed authorship of the various sections.

Compilation of this report was facilitated by efficient processing and analysis software,

major portions of which were developed by G. Maxwell, E. Cranswick, and C. Mueller.

The resources of the National Strong Motion Data Center, as initially implemented by

L. Baker, G. Maxwell, and J. Fletcher and operated by H. Bundock permitted this large

data set to be efficiently processed. W. Kohler developed software for conversion of the

data set to a format compatible with data recorded on the portable cassette recorders.

The talents of C. Sullivan with T^jX were most helpful and are certainly appreciated.

15

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Decker, F. L. and R. L. Richardson, 1972, Influence of material properties on Rayleigh

critical-angle reflectivity, J. Acous. Soc. Am. 51, 1609-1617.

Dorcherdt, R. D., Glassmoyer, G., and Wennerberg, L., 1986, Influence of welded

boundaries in anelastic media on energy flow and characteristics of P, 5-1 and S-

II waves: Observational evidence for inhomogeneous body waves in low-loss solids,

submitted to J. Geophys. Res.

Dorcherdt, R. D. and L. Wennerberg, 1985, General P, type-I 5, and type-E[ S waves in

anelastic solids: Inhomogeneous wave fields in low-loss solids, Bull. Seismol. Soc. Am.

bf 75, 1729-1763.

Dorcherdt, R. D., Fletcher, J. D., Jensen, E. G., Maxwell, G. L., VanSchaack, J. R.,

Warrick, R. E., Cranswick, E., Johnston, M. J. S., and McClearn, R., 1985, A General

Earthquake Observation System (GEOS): Seismol. Soc. Am. Bull. 75, 1783-1823.

Drekhovskikh, L. M., 1960, Waves in Layered Media, Academic Press, New York, 34 p.

Fuis, G. S., McCarthy, J., and Howard, K. A., 1986, A seismic-refraction survey of the

Whipple Mountains metamorphic core complex, southeastern California: A progress

report from PACE [abs.], Geol. Soc. America Abs. w/Prog., 18, 356.

Healy, J. H., Mooney, W. D., Dlank, H. R., Gettings, M. E., Kohler, W. M., Lamson, R.,

and Leone, L. E., 1982, Saudi Arabian seismic deep-refraction profile: Final Project

Report, U.S. Geol. Surv. Saudi Arabian Mission Open-File Report 02-37, 429 p.

Howard, K. A., 1986, PACE the Pacific to Arizona crustal experiment [abs.], Geol. Soc.

America Abs. w/Prog., 18, 362.

16

Figure 1. Side and front panel view of the General Earthquake Observation System (GEOS) together with a WWVB antenna and two sets of three-component sensors commonly used to provide more than 180 dB of linear, dynamic range. System operation for routine applications requires only initiation of power. Full capability to reconfigure system in the field is facilitated by simple operator response to english language prompts via keyboard.

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Figure 3: Map showing locations of three deployments of GEOS recorders (labeled by three digit station names) relative to cassette recorder deployments, and shots (labeled by shot point number).

Table 1:

Master Shot List

PACE - 1985

Shot Shot Number Point

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

8

11

13

9

9'

8X

10

4A

9X

9X 1

12

11

14

3

2

3'

2'

7

1

Date Shot Time

NOV 309 7

NOV 309 7

NOV 309 7

NOV 309 7

NOV 309 7

NOV 309 9

NOV 309 9

NOV 309 9

NOV 309 9

NOV 309 9

NOV 312 6

NOV 312 6

NOV 312 6

NOV 312 6

NOV 312 6

NOV 312 6

NOV 312 6

NOV 312 9

NOV

5, 0

5, 2

5, 4

5, 6

5,30

5, 0

5, 2

5, 4

5, 6

5, 30

1. 0

1. 2

1, 4

1. 6

7, 8

7, 30

7, 34

8, 0

8,

1985 0.011

1985 0.009

1985 0.017

1985 0.013

1985 0.014

1985 0.011

1985 0.010

1985 0.007

1985 0.011

1985 0.013

1985 0.006

1985 0.010

1985 0.008

1985 0.010

1985 0.013

1985 0.011

1985 0.013

1985 0.007

1985

Latitude Longitude

34 114

35 115

33 113

34114

34114

34 114

34114

34114

34 114

34 114

34 113

35 115

33 114

34 114

34 114

34114

34114

34113

33

1 16

4 9

37 58

31 36

31 36

4 17

48 55

16 29

25 32

25 32

54 34

4 9

37 59

631

0 38

6 31

0 38

41 56

49

.1915

.0732

.6421

.4429

.5355

.3179

.9558

.7720

.9558

.7720

.4078

.8740

.5139

.9536

.0713

.0464

.8152

.6694

.8152

.6694

.5559

.6748

.6421

.4429

.0963

.0605

.3268

.1450

.1779

.7549

.3268

.1450

.1779

.7549

.4065

.3975

.8256

Size (Ibs)

3000

4000

4000

4000

500

1000

3000

2000

1000

500

4000

2000

2100

1000

1000

500

500

3000

2000114 43.1675

20

21

22

23

24

25

26

27

28

29

30

4B

IX

12

14

5

11

6X

7

1

4B

6

NOV 312 9

NOV 312 9

NOV 317 6

NOV 317 6

NOV 317 6

NOV 317 6

NOV 317 6

NOV 317 9

NOV 317 9

NOV 317 9

8

8

12

12

12

12

12

13

13

13

/ 4

/

6

0

/ 2

/ 4

/ 6

/ 8

/

0

/ 2

/ 4

NOV 13, 317 9 8

1985 0.010

1985 0.013

1985 2.93

1985 0.011

1985 0.154

1985 0.010

1985 0.010

1985 0.008

1985 0.011

1985 0.010

1985 0.010

34114

33 114

34 113

33 114

34 114

35 115

34 114

34 113

33 114

34 114

34 114

13 25

57 40

54 34

37 59

21 16

4 9

341

41 56

49 43

13 25

27 9

.4583

.5533

.3845

.0010

.5559

.6748

.0963

.0605

.4211

.7134

.6421

.4429

.5605

.0605

.4065

.3975

.8256

.1675

.4583

.5533

.9460

.3169

2000

500

2400 SHOT TIME NOT EXACT

3200

1000 (LATE)

2000

1000

2000

3000

2000

720

MOOOOVOVOVO(O(O(O(O(O(O(O(O(O(O(O

O CD itk to O CD Ch i

ltkU)U)UU>U>(«>U>U>U>UU> OOOOOOOh'H'h'H U)U>U>U>U>U>U>U)U>K> fto vo vo CD 9> tn in * u> u> (o i-* fr tn Ch Ch «J OB <o o M (o u> «j ^ in A u> K> M H o vo H-

U»O»UU>(«*O>ilk||ki|k|tk|tk|tk

(O (O (O (O (O (O K) (O (O (O (O itk (O (O (- (O (O (O (O (O (O (O (Ooooooooooooo ooooooooooooooooooooooo ooooooooooo

(0(0(0(0(0(0(0(0(0(0oooooooooo oooooooooo

H I-1 Min vo CD«O UlCD (D O

I-1 H

Ift^SttSSw

B"B"B"B"B*B"B"B"B"B"B"

Table

3: Firs

t depl

oyme

nt,

station

azim

uths

an

d di

stan

ces.

Shot number

1 Shot point 8

Stat

ion

Radi

al azimuth

Dist

ance

(k

m)

160

162

164

166

168

170

172

174

176

178

180

331

332

332

331

330

330

329

329

329

328

328

59.2

61.3

63.3

65.3

67.2

69.4

71.2

73.1

75.1

77.1

79.1

Shot nu

mber

2

Shot point 11

Station

Radi

al azimuth

Distance (km)

160

162

164

166

168

170

172

174

176

178

180

141

141

140

141

141

141

141

141

141

142

142

84 82 80 78

76

74.0

72.2

70.2

68.1

66.1

64.1

Shot n

umber

3 Sh

ot point 13

Station

Radi

al azimuth

Dist

ance

(k

m)

160

162

164

166

168

170

172

174

176

178

180

330

330

330

329

329

329

329

329

328

328

328

110.8

112.9

114.9

116.9

118.8

121.0

122.8

124.7

126.7

128.7

130.7

Shot nu

mber

4

Shot

point 9

Stat

ion

Radial az

imut

h Distance (k

m)

160

162

164

166

168

170

172

174

145

140

128

274

314

315

315

316

6.0

4.0

2.1

0.1

2.1

4.4

6.2

6.2

176

178

180

316

316

316

10.2,

12.3

14.3

Shot nu

mber

5

Shot point 9'

Station

Radial azimuth

Distance (km)

160

162

164

166

168

170

172

174

176

178

180

145

140

128

274

314

315

315

316

316

316

316

6.0

4.0

2.1

0.1

2.1

4.4

6.2

8.2

10.2

12.3

14.3

Shot

nu

mber

6

Shot point 8X

Station Ra

dial

azimuth

Distance (km)

160

162

164

166

168

170

172

174

176

178

180

331

331

331

330

330

329

329

329

328

328

328

52.7

54.7

56.7

58.7

60.6

62.9

64.6

66.6

68.6

70.6

72.5

Shot nu

mber

7

Shot point 10

Stat

ion

Radial az

imut

h Distance (km)

160

162

164

166

168

170

172

174

176

178

180

138

137

136

137

137

137

137

137

137

137

137

48.3

46.3

44.4

42.3

40.3

38.0

36.2

34.2

32.1

30.1

28.1

Shot nu

mber

8

Shot point 4A

Stat

ion

Radi

al az

imut

h Distance (km)

160

162

164

166

168

170

341

341

340

338

337

335

25.9

27.9

29.9

31.8

33.6

35.8

172

174

176

178

180

334

334

333

332

331

37.5

39.4

41.4

43.3

45.2

Shot

number

9 Shot point 9X

Station Ra

dial

azimuth Distance (k

m)

160

162

164

166

168

170

172

174

176

178

180

336

336

335

331

329

327

326

325

324

324

323

7.0

9.1

11.1

13.1

15.0

17.2

19.0

21.0

23.0

25.0

27.0

Shot number

10

Shot point 9X

'

Station Ra

dial

az

imut

h Distance (k

m)

160

162

164

166

168

170

172

174

176

178

180

336

336

335

331

329

327

326

325

324

324

323

7.0

9.1

11.1

13.1

15.0

17.2

19.0

21.0

23.0

25.0

27.0

Table

4: Second de

ploy

ment

, st

atio

n az

imut

hs and di

stan

ces,

Shot nu

mber

11

Shot point 12

Stat

ion

Radi

al az

imut

h Di

stan

ce (km)

234

238

242

228

224

223

0.9

2.9

5.0

226

230

234

238

242

219

219

219

219

219

80.8

82.8

84.8

86.8

88.9

202

206

210

214

218

222

226

230

234

238

242

225

225

225

225

225

224

224

224

224

224

224

109.3

111.3

113.3

115.2

117.3

119.1

121.0

123.

0125.0

127.0

129.1

Shot nu

mber

15

Shot point 2

Station Ra

dial

az

imut

h Distance (km)

Shot nu

mber

12

Shot point 11

Station Radial az

ljni

th Distance (km)

202

206

210

214

218

222

226

230

234

238

242

40 40 40 41 41 43 45 45

4646

47

31.2

29.2

27.2

25.3

23.2

21.3

19.4

17.4

15.4

13.4

11.4

202

206

210

214

218

222

226

230

234

238

242

145

146

147

148

149

150

150

151

152

153

154

116.3

117.0

117.6

118.7

119.2

120.4

121.6

122.1

123.0

123.7

124.5

Shot number

16

Shot point 3*

Stat

ion

Radial az

imut

h Distance (k

m)

Shot number

13

Shot

point 14

Station

Radial azimuth

Dist

ance

(km)

202

206

210

214

218

222

226

230

234

238

242

33 33 32 33 30 33

40 27

228

224

223

15.1

13.1

11.1

9.1

7.0

5.1

3.1

1.2

0.9

2.9

5.0

202

206

210

214

218

222

226

230

234

238

242

38 38 38 38 38 38 39 38 38 38 38

84.

82.

80.

78,

7674 72

70 6866

Shot

number

17

Shot

point 2*

Stat

ion

Radial az

imut

h Distance (k

m)

64.1

Shot number

14

Shot point 3

Stat

ion

Radial az

imut

h Di

stan

ce (k

m)

202

206

210

214

218

222

226

230

234

238

242

40 40 40 4141 43454546

4647

31.2

29.

27.

25.

23.

21.

19.4

17.4

15.4

13.4

11.4

202

206

210

214

218

222

226

230

33 33 32 33 30 33 40 27

15.1

13.1

11.1 9.1

7.0

5.1

3.1

1.2

Shot number

18

Shot point 7

Stat

ion

Radial az

imut

h Distance (k

m)

Shot

number

19

Shot

point 1

Stat

ion

Radial az

imut

h Distance (k

m)

202

206

210

214

218

222

226

230

234

238

242

32 32 31 32 31 31 32 31 31 30 29

50.8

48.8

46.8

44.8

42.7

40.8

38.8

36.9

34.8

32.9

30.9

Shot

number

20

Shot point 4B

Stat

ion

Radial az

imut

h Distance (k

m)

202

206

210

214

218

222

226

230

234

238

242

207

214

216

212

215

213

211

213

214

215

215

0.6

2.6

4.7

6.6

8.7

10.6

12.7

14.6

16.6

18.6

20.6

Shot

number

21

Shot

point IX

Stat

ion

Radial az

imut

h Distance (k

m)

202

206

210

214

218

222

226

230

234

238

242

37 37 37 38 37 38 39 39 39 39 38

36.5

34.5

32.4

30.5

28.4

26.5

24.5

22.6

20.5

18.5

16.5

202

206

210

. 214

218

.,22

2

220

220

220

220

220

220

68.9

70.9

72.9

74.8

77.0

'78.8

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u> u> ui u> u>VO OB 09 09 «J M 09 I/I K» VO

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u>u> u> u> u> u> u> u> u> u> w w(- OOOOvQ\PvOOBOBD«JK) vo (M»> o Cj S M OD in K» vo

M M K> Kl W*******

Table 6: Maximum observed accelerations (see figures 31-35)

Station

391166166234234230230164168164168

* Upper bound based on linear extrapolation of recorded data adjacent to clipped data point. Lower bound is maximum on scale at 6db gain. Note that the upper bound is slightly less than if ground motion at station 166 had scaled with shot size as station 164, but greater than if it had scaled as station 168.

Distancefrom shot pt.

< 50 meters.1 km 983.1 km.9 km.9 km1.2 km1.2 km2.1 km2.1 km2.1 km2.1 km

Max ace.(cm /sec2 )

539< ace. <~ 1500*

3224.13.51.41.0

11.53.82.41.0

Shot size(Ibs.)

1000400050010005001000500

40004000500500

Shotpoint

6X99'

33'

33'

999'9'

:01.19-1 14:16.07>» TIME=TIME-RANGE/06.00234-5

J? 0°

H l^

Figure Al(a), shot point 8: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

-zV

<«+34:01.19-114:16.07>» TIME=TIME-RANGE/06.00 12345

Figure Al(b), shot point 8: 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:01.19-114:16.07>» TIME=TIME-RANGE/06.00 12345 o

Figure Al(c), shot point 8: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

012345678 91011121314151617181920212223242526272829I I i I I I I I I I I I I I I I i I I I i I I I I I 1

Figure Al(d), shot point 8: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by 2a*-2fl « 6 x 10~" 7 to get cm/sec). Times are unreduced beginning at time indicated.

0 1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829 oi i i i i i i i i i i i i i i i i i i i i i i i i i i I

Figure Al(e), shot point 8: 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by 2a*-2» « 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

01 2345678 91011121314151617181920212223242526272829 o

Figure Al(f), shot point 8: 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^ ^ * 6 x 10~7 to get cm/sec). Times are unreduced beginning at time indicated.

<«+35:04.64-115:09.44>» T!ME=TIME-RANGE/06.00 12345

Figure A2(a), shot point 11: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+35:04.64-1 15:09.44>» TIME=TIME-RANGE/06.00 12345 O

Figure A2(b), shot point 11: 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+35:04.64-115:09.44>» T IME=TIME-RANGE/06.00 12345

Figure A2(c), shot point 11: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

012345678 91011121314151617181920212223242526272829 ^OC J n

L^l^

l^40**^*^^N<ifr^^

^f^^^

00

o

S o

C 1 _ O

oo

GJ iO"CD

SO

SO hO

-vl

<

o *o-CD

Figure A2(d), shot point 11: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by 2ai^2fl « 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

01 2345678 91011121314151617181920212223242526272829I I I I I I I I I I I I I ! I I I I I I I I I I I i I I

I I ' I I I I I I I I I I I I I I 1 1 .1.1 _ I

Figure A2(e), shot point 11: 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by 2a*° 2ft « 6 x 10~7 to get cm/sec). Times are unreduced beginning at time indicated.

01 2345678 91011121314151617181920212223242526272829 O

Figure A2(f), shot point 11: 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by 2a*-2ft * ® x ^~7 *° Se* cm/sec). Times are unreduced beginning at time indicated.

<«+33:37.54-113:58.32>» TIME=TIME-RANGE/06.00 12345

Figure A3 (a), shot point 13: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+33:37.54-113:58.32>» ^!ME=TIME-RANGE/06.00 123


<«+33:37.54-113:58.32»> T|ME=TIME-RANGE/06.00 123


01 2345678 91011121314151617181920212223242526272829ii i i .iiiiiiiiiiiiiiiiiiiiiiiiir o

& oo 9 m

zO;o

M

M^N*^^

^^

iO k CD

§0

SO

O

Figure A3(d), shot point 13: 30 second vertical velocity record. Abscissa is labele^ with maximum counts in record (multiply by ^^ « 6 x lO"7 to get cm/sec). Times are unreduced beginning at time indicated.

iz.

0 1 2345678 91011121314151617181920212223242526272829~iiiiiiiiiiiiiiiiiijiiiiiiiiir

ttf<^^

wit<wj*tt^^

i i i j i i i i

en C/)m

m o

en

O 1

00

O "CD

-«j

SO

oo

io

Figure A3(e), shot point 13: 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by ^Q-e « 6 x 10~7 to get cm/sec). Times are unreduced beginning at time indicated.

0 1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829 "I I I I I I T O

I I I I LI II I I

Figure A3(f), shot point 13: 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by -&£& « 6 x lO"7 to get cm/sec). Times are unreduced beginning at time indicated.

<«+34:31.96-114:36.77>» TIME=TIME-RANGE/06.00 12345

Figure A4(a), shot point 9, NW stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:31.96-114:36.77>» TIME=TIME-RANGE/06.00

Figure A4(b), shot point 9, NW stations: 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:31.96-114:36.77>» TIME=TIME-RANGE/06.00 123

O

Figure A4(c), shot point 9, NW stations: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

-(7

<«+34:31.96-114:36.77»> TIME=TIME-RANGE/06.00 12345

Figure A4(d), shot point 9, SE stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:31.96-1 14:36.77>» TIME=TIME-RANGE/06.00

1_________2_________3_________4_________5_________'II i1 I ' 11 I '. I Ml ' I I ' I' I ' I I ' | ' I I ' I ' I ' I ' I ' 1 ' I ' I ' | ' I ' I ' I ' I ' I ' I I ' 1 ' I ' | ' I ' I I ' I ' I ' 1 ' I ' I ' I ' | ' I ' I ' I ' I ' I ' I ' I ' I ' I ' o

Figure A4(e), shot point 9, SE stations: 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:31.96-1 14:36.77>» TIME=TIME-RANGE/06.00 12345

Figure A4(f), shot point 9, SE stations: 6 second velocity record. Positive NST'E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829

Figure A4(g), shot point 9: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by 2a4°2ft « 6 x 10~~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

0 1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829 o

Fieure A4(h), shot point 9: 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by ^ * 6 x 10~7 to & cm/sec^' TimeS "e unreduced beginning at time indicated.

01 2345678 91011121314151617181920212223242526272829 O

Figure A4(i), shot point 9: 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^g « 6 x 10~7 to «et cm/sec)' Times mmaximum counts in record (multiply unreduced beginning at time indicated.

<«+34:31.96-114:36.77>» TIME=TIME-RANGE/06.00 12345

Figure A5(a), shot point 9', NW stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:31.96-1 14:36.77>» TIME=TIME-RANGE/06.00 "" Z1 23456 ̂O

C ) ~n

O sO

O

Figure A5(b), shot point 9', NW stations: 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

yr

<«+34:31.96-114:36.77>» TIME=TIME-RANGE/06.00 " ~Z.1 23456 _O

C J ~n

o

Figure A5(c), shot point 9', NW stations: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:31.96-1 14:36.77>» TIME=TIME-RANGE/06.00 1234-5

Figure A5(d), shot point 9', SE stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:31.96-114:36.77>» TIME=TIME-RANGE/06.00 12345

-i^

Figure A5(e), shot point 9', SE stations: 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+ 34:31.96-114:36.77>» TIME=TIME-RANGE/06.00 1 2345

Figure A5(f), shot point 9', SE stations: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

59

01 2345678 91011121314151617181920212223242526272829i i i i i i i i i i i i i i i i i i i i i i

20o

Figure A5(g), shot point 9': 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by 2al° 2fl w 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

60

01 2345678 91011121314151617181920212223242526272829 o£

Fieure A5(h), shot point 9': 30 second N33W velocity record. Abscissa is labeled with unts in record multil by fi * 6 x 10~7 to get cm/sec). Times aremaximum counts in record (multiply by

unreduced beginning at time indicated.

61

01 2345678 91011121314151617181920212223242526272829 OI I I I I I I I I I I I i

Fieure A5(i), shot point 9': 30 second N57E velocity record. Abscissa is labeled with maUnum counts in record (multiply by ^ » 6 x 1<T7 to get cm/sec). Times are unreduced beginning at time indicated.

62

<«+34:04.41-114:17.87>» TiME=T!ME-RANGE/06.00 12345

Figure A6(a), shot point 8X: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

63

NO

RM

ALIZ

ED

C

M/S

EC

160.V

162.V85*3

09 +

09:0

0:0

0.0

1 1

164.V

1

66

.V

168.V

170.V

172.V

1

74

.V1

78

.V

18

0.V

O c-

xD

M

d

eo O

00

* "fc *

1

m"*

o*

d

o>^O

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C

j

A. «^3

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o a

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(P m

W

' 8

52

.7

RAN

GE

56

.0

58

.0

60

.0

62

.0

64

.0

66

.0

68

.07

0.0

72.5

<«+34:04.41-114:17.87>» TIME=TIME-RANGE/06.00 12345 O

Figure A6(c), shot point 8X: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

65

01 2345678 91011121314151617181920212223242526272829

i i i i i i i i i i i I i I I I I I I I I 1 I I I

Figure A6(d), shot point 8X: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by -&£& w 6 x 10~ 7 to Set cm/sec). Times are unreduced beginning at time indicated.

66

2345678 91011121314151617181920212223242526272829 O

(|||(f^

i i i I i I I I i I I I I I

Figure A6(e), shot point 8X: 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by jj£^ « 6 x 10'7 to get cm/sec). Times are unreduced beginning at time indicated.

67

01 2345678 91011121314151617181920212223242526272829 O

Figure A6(f), shot point 8X: 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^p « 6 x lO'7 to get cm/sec). Times aremaximum counts in recora (multiply unreduced beginning at time indicated.

68

<«+34:48.51 -114:55.95>» TtME=TIME-RANGE/06.00 12345

^^f^l^^ff^fv^^


<«+34:48.51-1 14:55.95>» T!ME=TIME-RANGE/06.00 12345 6 n°

G;o


70

<«+34:48.51-1 14:55.95>» TIME=TIME-RANGE/06.00 12345


0 1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829

I I I I

Figure A7(d), shot point 10: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by ^i^, « 6 x 10'7 to get cm/sec). Times are unreduced beginning at time indicated.

7?

01 2345678 91011121314151617181920212223242526272829Q3

Figure A7(e), shot point 10: 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by ^^ » 6 x 10~ 7 to get cm/sec). Times aremaximum counts in recora (multiply unreduced beginning at time indicated.

7

01 2345678 91011121314151617181920212223242526272829 OI I I I I I I I I I I I I I I i i i i i I I I I I I I 1

HWty»iMWM"

i i i i i i i i i i i i

O

Figure A7(f), shot point 10: 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by »£» « 6 x 10"7 to get cm/sec). Times aremaximum counts m recora (multiply unreduced beginning at time indicated.

74

<«+34:16.07-114:29.05>» T!ME=TIME-RANGE/06.00 12345 O

Figure A8(a), shot point 4A: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

75

<«+34:16.07-114:29.05>» TIME=TIME-RANGE/06.00 12345 O

J.J

Figure A8(b), shot point 4A: 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

76

<«+34:16.07-114:29.05>» TIME=TIME-RANGE/06.00 12345 6 ^O

Figure A8(c), shot point 4A: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

11

01 2345678 91011121314151617181920212223242526272829

^

^ W*>NW»«* *** " **

^|H^

Figure A8(d), shot point 4A: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by ^rr^ « 6 x 10" 7 to get cm/sec). Times are unreduced beginning at time indicated.

78

1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829I I I 1 ill,. I I I I I I I I I I I I I I 1 i I I I i I I I

4^«w^B*^*¥»*

I III 1 I I I I I I I I I I I I I II 1 I I L I II

Figure A8(e), shot point 4A: 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by ^p « 6 x 10"7 to get cm/sec). Times are unreduced beginning at time indicated.

79

01 2345678 91011121314151617181920212223242526272829

Figure A8(f), shot point 4A: 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by &£& « 6 x 10~ 7 to get cm/sec). Times aremaximum counts in record (multiply unreduced beginning at time indicated.

80

<«+34:25.82-114:32.67>» TIME=TIME-RANGE/06.00 1 2345

Figure A9(a), shot point 9X: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

81

<«+34:25.82-114:32.67>» TIME=TIME-RANGE/06.00 123

Figure A9(b), shot point 9X: 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times a-re reduced by 6 km/sec. Shot time is indicated.

82

<«+34:25.82-114:32.67>» TIME=TIME-RANGE/06.00 12345

Figure A9(c), shot point 9X: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

83

0 1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829

||}^tol^

I I I I I I I I I

o> | 9 m isj < o<- J m

o

Ol s-~\K> v J

< I

c i- O -n

'

o

Figure A9(d), shot point 9X: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by ^^ « 6 x 10~7 to get cm/sec). Times are unreduced beginning at time indicated.

8

01 2345678 91011121314151617181920212223242526272829

oo

Figure A9(e), shot point 9X: 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by 2al° 26 w 6 x 10"7 to get cm/sec). Times are unreduced beginning at time indicated.

8

0 1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829

jj|ll^^O ..

CO

iO "CD

CD

SO CD

Figure A9(f), shot point 9X: 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by 2a^2> » 6 x 10"7 to get cm/sec). Times are unreduced beginning at time indicated.

86

<«+34:25.82-114:32.67>» TIME=TIME-RANGE/06.00 12345

26 0°

QTO

Figure A10(a), shot point 9X': 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

87

<«+34:25.82-114:32.67>» TIME=TIME-RANGE/06.00 12345 °

Fieure A10(b), shot point 9X': 6 second velocity record. Positive N33W motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:25.82-114:32.67>» T!ME=TIME-RANGE/06.00 12345 °

Figure A10(c), shot point 9X1: 6 second velocity record. Positive N57E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

01 2345678 91011121314151617181920212223242526272829

Future A10(d), shot point 9X': 30 second vertical velocity record. Abscissa is labeled with mLimum counts in record (multiply by yg* - 6 x UT* to get cm/sec). Times are unreduced beginning at time indicated.

90

01 2345678 91011121314151617181920212223242526272829

Figure A10(e), shot point 9X': 30 second N33W velocity record. Abscissa is labeled with maximum counts in record (multiply by ^^ « 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

91

01 2345678 91011121314151617181920212223242526272829

fl$^^

o

O 1

I I I I I I I 1 L 1 1 1 I I I 1 I I ' I I I I I I I I I I I

Figure A10(f), shot point 9X': 30 second N57E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^rz^y « 6 x 10~7 to get cm/sec). Times are unreduced beginning at time indicated.

<«+34:54.56-113:34.67>» TIME=TIME-RANGE/06.00 12345 O

Q}

Figure All (a), shot point 12: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

9

<«+34:54.56-113:34.67»> TIME=TIME-RANGE/06.00 12345 o

Figure All(b), shot point 12: 6 second velocity record. Positive N20E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

94

<«+34:54.56-113:34.67>» TIME=TIME-RANGE/06.00 12345 o o

O)

s^<^$^^

o

CD O \O

-00

Figure All(c), shot point 12: 6 second velocity record. Positive N110E motion is to right. Abscissa is dbtance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

95

01 2345678 91011121314151617181920212223242526272829

"**tfj^^

I IV

oo^AA^^|l||j^^

ill

M*^^

'^J^^

f^ii^N>^

^

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i i i i i i i i i i i i i i i i i 'i i i i i i i

OO

oo

o

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CT)


96

0 1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829 O

CD

i i i I I i I i i I I i i i I I i i I i I I I I I i i I I

re AllW shot point 12: 30 second N20E velocity record. Abscissa is labeled with £J cotts in record (multiply by ^ « 6 X 10- to get cm/sec). T.mes are


01 2345678 91011121314151617181920212223242526272829I I I I I I I II I I I I I I I I I T O

O

Fieure AlKf), shot point 12: 30 second N110E velocity record. Abscissa is labeled with Sum counts ^record (multiply by £, « 6 x 1CT' to get cm/sec). Tnnes are


98

<«+35:04.64-115:09.44>» TIME=TIME-RANGE/06.00 12345


99

<«+35:04.64-115:09.44>» TIME=TIME-RANGE/06.00 1234

ftWi^^o

pfyhfW^

Figure A12(b), shot point 11: 6 second velocity record. Positive N20E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

100

<«+35:04.64-1 15:09.44>» TIME=TIME-RANGE/06.00 12345 6 n°

2:0


10

01 2345678 91011121314151617181920212223242526272829

^^

Fieure A12(d), shot point 11: 30 second vertical velocity record. Abscissa is labeled with mSmum counts in record (multiply by 5^ « 6 x 10^ to get cm/sec). T,mes are


01 2345678 91011121314151617181920212223242526272829

- W*<f»*^^o

O

CD O \O i

005 en

O

O


103

012345678 91011121314151617181920212223242526272829

O

Figure A12(f), shot point 11: 30 second N110E velocity record. Abscissa is labeled with maximum counts in record (multiply by 2a*-2» w ^ x ^~7 *° ^ cm/sec)- Times are


104

<«+33:37.10-114:59.06>» TIME=TIME-RANGE/06.00 12345 O


105

<«+33:37.10-114:59.06>» TIME=TIME-RANGE/06.00 12345 O


106

<«+33:37.10-114:59.06>» TIME=TIME-RANGE/06.00 12345 O


107

01 2345678 91011121314151617181920212223242526272829 o

5- ^sw*/^|^ g

1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

tooSo

O ~n

CO

unreduced beginning at time indicated

J08

01 2345678 91011121314151617181920212223242526272829 O

ieure A13(e) shot point 14: 30 second N20E velocity record. Abscissa is labeled with mSmuJittsIn record (multiply by ^ « 6 X 10- to get cm/sec). Tlmes are

unreduced beginning at time indicated. _

01 2345678 91011121314151617181920212223242526272829

< O

oo

^^unreduced beginning at time indicated.

no

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 1234 5 O

Figure A14(a), shot point 3, SW stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

j 1

<«+34:06.33-1 12

TIME=TIME-RANGE/06.00 345

Figure A14(b), shot point 3, SW stations: 6 second velocity record. Positive N20E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

n.?

<«+34:06.33-114:31.15>» T1ME=T1ME-RANGE/06.00 12345

Figure A14(c), shot point 3, SW stations: 6 second velocity record. Positive N110E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 12345

Figure A14(d), shot point 3, NE stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

11

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 1 2 3 45

r*J ^- -v.?o

Figure A14(e), shot point 3, NE stations: 6 second velocity record. Positive N20E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 12345

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Figure A14(f), shot point 3, NE stations: 6 second velocity record. Positive N110E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

01 2345678 91011121314151617181920212223242526272829z:o

o


1 \ 7

01 2345678 91011121314151617181920212223242526272829 O

O

Fieure A14(h), shot point 3: 30 second N20E velocity record. Abscissa is labeled with ISum counts in record (multiply by ^ « 6 x Mr' to get cm/sec). Tnnes are unreduced beginning at time indicated.

tie

01 2345678 91011121314151617181920212223242526272829Q3

I I I I I I I I I I I I I I ill I

re AMffl shot point 3: 30 second N110E velocity record. Abscissa is labeled with um counts ^record (multiply by ^ * 6 x 10- to get cm/sec). Tnnes are

unreduced beginning at time indicated.I jo

<«+34:00.18-114:38.75>» TIME=TIME-RANGE/06.00 12345 O


120

<«+34:00.18-114:38.75>» TIME=TIME-RANGE/06.00


<«+34:00.18-1 14:38.75>» 123

TIME=TIME-RANGE/06.00 4

Figure A15(c), shot point 2: 6 second velocity record. Positive NllOE motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

" 122

01 2345678 91011121314151617181920212223242526272829

i i i i i i i i i i i i I i I I I I I I


12

01 2345678 91011121314151617181920212223242526272829I I J I I

||ft|l^

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I I I I I I I II I I I I I I I I I I I I I I I I I I I I

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Future A15(e), shot point 2: 30 second N20E velocity record. Abscissa is labeled with mrimrnn counts in record (multiply by ptfj, « 6 x 10~T to get cm/sec). Times are unreduced beginning at time indicated. ^

012345678 91011121314151617181920212223242526272829

^tiptylW^^

i i i i i i i i i i i i i i i i i i i i i i i i i i i i i

Figure A15(f), shot point 2: 30 second N110E velocity record. Abscissa is labeled with midmum counts in record (multiply by £» » 6 x 1Q-7 to get cm/sec). Times aremaximum counts in recora (multiply unreduced beginning at time indicated.

12

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 12345

Figure A16(a), shot point 3', SW stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

126

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 12345

AMA^/WvNA~-vAs/\/Y I /

Figure A16(b), shot point 3', SW stations: 6 second velocity record. Positive N20E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

127

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 12345

Figure A16(c), shot point 3', SW stations: 6 second velocity record. Positive N110E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

128

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 12345 6 0°

Figure A16(d), shot point 3', NE stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

12°

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 12345

Figure A16(e), shot point 3', NE stations: 6 second velocity record. Positive N20E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

130

<«+34:06.33-114:31.15>» TIME=TIME-RANGE/06.00 12345 o

Figure A16(f), shot point 3', NE stations: 6 second velocity record. Positive NllOE motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

~ 13?

01 2345678 91011121314151617181920212223242526272829

w/*^^

Future A16(g), shot point 3': 30 second vertical velocity record. Abscissa is labeled with mSmum counts in record (multiply by ^ » 6 x 10- to get cm/sec). Times are unreduced beginning at time indicated. ^

:41.41-113:56.40>» TIME=TIME-RANGE/06.002345 6 0°


133

<«+34:41.41-113:56.40>» TIME=TIME-RANGE/06.00 12345 6 0°

2:0


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v^^^^VVAAVJ\/\^AA^v^^^^A^^^

6Z82£292S2>2CZ22 120261 91 £19151 tlCl 21 UOl 6 8£9StC2 10

01 2345678 91011121314151617181920212223242526272829 o73i i i i i i i i i i i i i i i i

Fieure AlSfel shot point 7: 30 second N20E velocity record. Abscissa is labeled with Sum counts In record (multiply by ^ « 6 X 10- to get cm/sec). T.mes are

unreduced beginning at time indicated.136

01 2345678 91011121314151617181920212223242526272829I I I I I I t I I I I I I I

(O

1

o

I I I 1 1 I I II I I I I I I I I I I I I I I f I I I I I I I

NJ

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Fieure A18(f), shot point 7: 30 second N110E velocity record. Abscissa is labeled with mLimum couats in record (multiply by ^ » 6 X 1Q-* to get cm/sec). Times are

unreduced beginning at time indicated. ^ < ^ -7

<«+33:49.83-114:43.17>» TIME=TIME-RANGE/06.00 12345


138

<«+33:49.83-114:43.17>» TIME=TIME-RANGE/06.00 12345


<«+33:49.83-114:43.17>» TIME=TIME-RANGE/06.00 12345

Figure A19(c), shot point 1: 6 second velocity record. Positive NllOE motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

^

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Fieure A19(d), shot point 1: 30 second vertical velocity record. Abscissa is labeled with nSum counts in record (multiply by £* « 6 * 10"T to «et cm/sec^ TlmeS "e unreduced beginning at time indicated.

01 2345678 91011121314151617181920212223242526272829 T I T

I I I ! I I I I I I I I I I I I I

ieure A19(e), shot point 1: 30 second N20E velocity record. Abscissa is labeled with n^cimum counts in record (multiply by ^ « 6 X 10'' to get cm/sec). Tunes are

unreduced beginning at time indicated.*"* f / '

»4<

01 2345678 91011121314151617181920212223242526272829 ^O

i*^^

i i i i i i i i i i i i i i i i i i i i i i i i i i i i i


<«+34:13.46-114:25.55>» TIME=TIME-RANGE/06.00 12345 6 0°

Figure A20(a), shot point 4B: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:13.46-114:25.55>» TIME=TIME-RANGE/06.00 12345

Figure A20(b), shot point 4B: 6 second velocity record. Positive N20E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

r

<«+34:13.46-114:25.55>» TIME=TIME-RANGE/06.00 12345

VsO

Figure A20(c), shot point 4B: 6 second velocity record. Positive N110E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

01 2345678 91011121314151617181920212223242526272829z:o

o

i i i

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unreduced beginning at time indicated. j ^ -7

01 2345678 91011121314151617181920212223242526272829I I I I I I I I I I I I I I I I I I I I T I I I I I

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unreduced beginning at time indicated.4 .1Me

01 2345678 91011121314151617181920212223242526272829I I I I I I I I I I I I I I I I I I I I I I I I

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uiii snov »» -£: 30 second N110E velocity record. Abscissa is labeled with n^mum coi'ntrin^ord (multiply by ^ « 6 x 10- to get cm/sec). Tm.es are


<«+33:57.38-114:40.00>» TIME=TIME-RANGE/06.00 12345

Figure A2l(a), shot point IX: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

ISO

<«+33:57.38-1 14:40.00>» TIME=TIME-RANGE/06.00 12345 O

Figure A21(b), shot point IX: 6 second velocity record. Positive N20E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

153

<«+33:57.38-114:40.00>» TIME=TIME-RANGE/06.00 12345 o

Figure A21(c), shot point IX: 6 second velocity record. Positive N110E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

15?

1 2345678 91011121314151617181920212223242526272829 O

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o


012345678 91011121314151617181920212223242526272829 O

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01 2345678 91011121314151617181920212223242526272829

I I I I I I I I I I I I I I I I I I I I

Figure A21(f), shot point IX: 30 second N110E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^rrrp « 6 x 10"7 to get cm/sec). Times are unreduced beginning at time indicated.

155

<«+34:54.56-113:34.67»> TIME=TIME-RANGE/06.00 12345


<«+34:54.56-113:34.67>» TIME=TIME-RANGE/06.00 12345 O


15

<«+34:54.56-113:34.67>» TIME=TIME-RANGE/06.00 12345


158

01 2345678 91011121314151617181920212223242526272829

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Figure A22(d), shot point 12: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by JSTZ^ « 6 x 10~7 to get cm/sec). Times are unreduced beginning at time indicated.

15P

01 2345678 910111213141516171819202122232425262728291 I I i 1 I I I I I 1 I I I I I I 1 I I T

en

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unreduced beginning at time indicated.J6C

01 2345678 91011121314151617181920212223242526272829z:o

I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

Fieure A22(f), shot point 12: 30 second N115E velocity record. Abscissa is labeled with midmum counts in record (multiply by ^ « 6 x 10-' to get cm/sec). Tunes are unreduced beginning at time indicated.

1 6:

<«+33:37.10-114:59.06>» TIME=TIME-RANGE/06.00 12345 O


~ J 62

<«+33:37.10-114:59.06>» TIME=TIME-RANGE/06.00 12345

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16

<«+33:37.10-114:59.06>» TIME=T!ME-RANGE/06.00 12345


I 6 ^r

01 2345678 91011121314151617181920212223242526272829


O

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01 2345678 91011121314151617181920212223242526272829I I.I I I I I I I I I I I I I I II I r

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Figure A23(e), shot point 14: 30 second N25E velocity record. Abscissa is labeled with mLimum counts in record (multiply by J*f ~ 6 x 10-' to get cm/sec). Tunes are unreduced beginning at time indicated.

"« 166

0 1 2 3 4 5 6 7 8 9 10 11 12 13 1415161718 1-9-20 21-22 23 oI I I I I I I I I I I I I I I I

A23(f), shot point 14: 30 second N115E velocity record. Abscissa is labeled with um counts in record (multiply by ^ * 6 x 1<T' to get cm/sec). Tunes are

unreduced beginning at time indicated.~* 167

<«+34:21.42-114:16.71>» TIME=TIME-RANGE/06.00 1234 6 _O

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° |AWMw/H^ 00

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168

«<+34:21.42-114:16.71»> TIME=TIME- RANGE/06.00 12345 O

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16°

<«+34:21.42-114:16.71 >» TIME=TIME-RANGE/06.00 12345


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0 1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829

frW»Hy»MVl4M»H^^W^>',i

^

Figure A24(d), shot point 5: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by 2aj£ 2a w 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

171

01 2345678 91011121314151617181920212223242526272829

Figure A24(e), shot point 5: 30 second N25E velocity record. Abscissa is labeled with maximum counts in record (multiply by 2*%-2* « 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

- 172

01 2345678 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 2'J 29

^^

sen 4^

Figure A24(f), shot point 5: 30 second N115E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^-^ « 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

17

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Figure A25(a), shot point 11 (fan shot): 6 second velocity record. Positive vertical motion is to left. Abscissa is labeled with maximum counts in record. Distances are ~ 117.5 ± 1.5km. Times are unreduced beginning at shot time + 19 seconds.

174

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8 ^i^^

Figure A25(b), shot point 11 (fan shot): 6 second velocity record. Positive N25E motion is to left. Abscissa is labeled with maximum counts in record. Distances are ~ 117.5± l.5km. Times are unreduced beginning at shot time + 19 seconds.

175

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Figure A25(c), shot point 11 (fan shot): 6 second velocity record. Positive NllSE-motion is to left. Abscissa is labeled with maximum counts in record. Distances are ~ 117.5 ± 1.5km. Times are unreduced beginning at shot time + 19 seconds.

- 176

01 2345678 91011121314151617181920212223242526272829I I I I I I I I f I I I I I I I I

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Figure A25(d), shot point 11: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by 2ai-2» w 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

177

01 2345678 91011121314151617181920212223242526272829 O

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I I I I I I I I I I I I I I I I I I

Figure A25(e), shot point 11: 30 second N25E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^-2^ w ® x ^~7 *° 8e* cm/sec). Times are unreduced beginning at time indicated.

178

01 2345678 91011121314151617181920212223242526272829i i i i t i i i i i i i i i i i i i i i i i i

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Figure A25(f), shot point 11: 30 second N115E velocity record. Abscissa is labeled with maximum counts in record (multiply by 2aJ° 2B « 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

179

<«+34:34.56-114:01.06>» TIME=TIME-RANGE/06.00 12345

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Figure A26(a), shot point 6X, SW stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

180

<«+34:34.56-114:01.06>» TIME=TIME-RANGE/06.00 12345

Figure A26(b), shot point 6X, SW stations: 6 second velocity record. Positive N25E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

<«+34:34.56-114:01.06>» TIME=TIME-RANGE/06.00 12345

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Figure A26(c), shot point 6X, SW stations: 6 second velocity record. Positive N115E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

18?

<«+34:34.56-114:01.06>» TIME=TIME-RANGE/06.00 12345

o

so

Figure A26(d), shot point 6X, NE stations: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

18

<«+34:34.56-114:01.06>» TIME=TIME-RANGE/06.00

Figure A26(e), shot point 6X, NE stations: 6 second velocity record. Positive N25E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

184

<«+34:34.56-114:01.06>» TIME=TIME-RANGE/06.00 12345

-OK^ ^~ ~^

Figure A26(f), shot point 6X, NE stations: 6 second velocity record. Positive N115E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

18

01 2345678 91011121314151617181920212223242526272829 O

Figure A26(g), shot point 6X: 30 second vertical velocity record. Abscissa is labeled with mSmum counts in record (multiply by ^ ~ 6 x 10"7 to get cm/sec). Times are


186

01 2345678 91011121314151617181920212223242526272829I I. I I I I I I I I I I I I I I I II I I I I I I

rV^ ^

I I I I I I I I I I I I i i i i i i i i i i i

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Figure A26(h), shot point 6X: 30 3econd N25E velocity record. Abscissa is labeled with mLmum counts in record (multiply by ^ « 6 X 1Q-T to get cm/sec). Tunes are unreduced beginning at time indicated.

187

1 2345678 91011121314151617181920212223242526272829

Figure A26(i), shot point 6X: 30 second N115E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^^ 6 x 10'7 to get cm/sec). Times are unreduced beginning at time indicated.

-113:56.40>» TIME=TIME-RANGE/06.00 2345 O


189

-113:56.40>» TIME=TIME-RANGE/06.00 2345 O


190

<«+34:41.41-113:56.40>» TIME=TIME-RANGE/06.00 12345


191

01 2345678 91011121314151617181920212223242526272829

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time md, 2

01 2345678 91011121314151617181920212223242526272829

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Figure A27(e), shot point 7: 30 second N25E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^J^ « 6 x 10~7 to get cm/sec). Times are unreduced beginning at time indicated. _ 1 Q

012345678 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29"1 T

I_i i I I I i I I I I I i i i I I I I I I I I I

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Fieure A27(f), shot point 7: 30 second N115E velocity record. Abscissa is labeled with maximum counts in record (multiply by 5^5, « 6 x 1Q-T to get cm/sec). T,mes are unreduced beginning at time indicated. _

<«+33:49.83-114:43.17>» TIME=TIME-RANGE/06.00 12345 o

00


195

<«+33:49.83-114:43.17>» TIME=TIME-RANGE/06.00 12345 o


i 96

<«+33:49.83-114:43.17>» TIME=TIME-RANGE/06.00 12345

00

Figure A28(c), shot point 1: 6 second velocity record. Positive N115E motion b to right. Abscissa is distance to shot point. Top of trace b labeled with station number. Times are reduced by 6 km/sec. Shot time b indicated.

197

01 2345678 91011121314151617181920212223242526272829

^^||u^^ft^MMfrWftW

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Fieure A28(d), shot point 1: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by ^ « 6 x 1<TT to get cm/sec). Times are unreduced beginning at time indicated.

012345678 91011121314151617181920212223242526272829

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Figure A28(e), shot point 1: 30 second N25E velocity record. Abscissa is labeled with maximum counts in record (multiply by 2**-2fl w ^ x 10~7 *° 8e* cm/sec). Times are unreduced beginning at time indicated.

19 O

012345678 91011121314151617181920212223242526272829

CO

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I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

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Figure A28(f), shot point 1: 30 second N115E velocity record. Abscissa is labeled with maximum counts in record (multiply by 2a^2ft « 6 x 10~ 7 to get cm/sec). Times are unreduced beginning at time indicated.

200

<«+34:13.46-114:25.55>» TIME=TIME-RANGE/06.00 12345

Figure A29(a), shot point 4B: 6 second velocity record. Positive vertical motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

-. 201

<«+34:13.46-114:25.55>» TIME=TIME-RANGE/06.00 12345

^^^¥>^^^

Figure A29(b), shot point 4B: 6 second velocity record. Positive N25E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

202

<«+34:13.46-114:25.55»> TIME=TIME-RANGE/06.00 12345 O

Figure A29(c), shot point 4B: 6 second velocity record. Positive N115E motion is to right. Abscissa is distance to shot point. Top of trace is labeled with station number. Times are reduced by 6 km/sec. Shot time is indicated.

203

01 2345678 910111213141516171819202122232425262728291 I I I I I T

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Figure A29(d), shot point 4B: 30 second vertical velocity record. Abscissa is labeled with maximum counts in record (multiply by ^p « 6 x 10~7 to get cm/sec). Times are unreduced beginning at time indicated.

c. U4

012345678 91011121314151617181920212223242526272829 T I I I T o£

Figure A29(e), shot point 4B: 30 second N25E velocity record. Abscissa is labeled with maximum counts in record (multiply by ^^ « 6 x 10~ 7 to get cm/sec). Times aremaximum counts in record (multiply unreduced beginning at time indicated. 205

01 2345678 91011121314151617181920212223242526272829

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0.001 r

STRTION=160 309:17:04 STP7IGN-160 0.001

10

10

10

10

-6

-7

0. 1 100

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10HZ

10HZ

UP

100

100

= 90 :

ICO

Figure Cl. Station 160 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N33W and N57E.

224

10' 309:17:26

10-5

10-6

10

10'

-7

0. 1

10-5

10-6

10

10'

-7

0. 1

10-5

10-6

10-7

0. 1

STflTION=162 309:17:26 STRTION=162 0.001

100

100

10 100HZ

Figure C2. Station 162 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N33W and N57E.

22

0.01

0.001

309:i7 :

10 -U

5 ID'5

10-6

10-7

10-8

2:LJ

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10

10

10-6

10-7

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STflTION=16i4 309:17:50 STRT1GN=164 0.001

UP

10'

io - 5

10 -6

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10HZ

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100 10HZ

UP

100

100

H = SO

100


226

309:18: 14O.Ole

10

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UP

100

H = 0

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22?

309:18:39O.OlF

0.001 r

STflTION=168 309:18:40 STflT10N=168 0.001

100

100

100.1 1 10 100 10 100

HZ HZFigure C5. Station 168 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N33W and N57E.

309: 18:56O.OlF

5TflTIGN=170 309:18:57 STRTIC'^170 0.001

10-7

100

100

1000.1 1 10 100HZ HZ


22?

309:18:40O.OlE

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10HZ

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10

UP

100

100

H = 90

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100

309:18:24CLOU

STRTION=174 309:18:25 STP,TION=174 0.001

10"

10-5

10-6

-710

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10'

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10-5

10-6

10'

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10HZ

10'

10-5

10-6

UP

100

h = 0

100

H = SO

0.1 1 10 ICO 10 100HZ HZ


309: 17:35 O.OlE ii.t

0.001

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CJ

10-s

10-6

10-7

0. 1

O.OlE-

0.001

STRTION=178 309:17:35 STRTION=178 0.001

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10HZ

UP :

. . .ttfl

10'

10-5

10010

' 6

UP

10 ICOHZ

i i limy O.OOlb i i i i ui|

10-4

£ io- 5

-6

10 100HZ

0.001H = SO :

0.1 i 10 - 100 10 100HZ HZ


232

0.00

10'

309: 17: 11

10 -5

10-6

10-7

0. 1

0.001

10-14

10-6

10-7

0. 1

0.001

10-14

10 -5

10-6

10-70.1

HZ

HZ

5TRTION=180 309:17:12 STRTICN=160 0.001

10

10

10HZ

UP

10'

10-5

10-6

10010

-7

UP

10 100

0.001

10"

HZ

= LJ 10-5

10-6

10010

-7 1 1 I I I I I I

10 100

= 900.001

10'

HZ

10-6

10010-7

H = 90

10 100HZ

Figure CIO. Station 180 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N33W and N57E.

233

312:20:29O.OOlfE

10

10"

<_,

10

10

-6

-7

0. 1

STRTION=202 312:20:30 5TRT1CN=202 0.001

10HZ

10

0.001HZ

10HZ

H = SO

0.001

10'

10-6

10010

-7

10HZ

UP

100

100

= SO :

100

Figure Cll. Station 202 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N20E and N110E.

234

312:20:55 O.Ole

0.001 r

STflT!ON=206 312:20:56 STRT10N=206 0.001

10

10-7

0. 1

100

100

100

Figure C12. Station 206 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N20E and N110E.

235

312: 18:57 O.Ole

312:18:59 STfiT 1 CK = 2 1 0

10

1C-7

0. 1

Figure CIS. Station 210 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N20E and N110E.

236

0.01

O.GC1

10'

312:18:43

10-5

10-6

10-7

0. 1

O.ClE-

O.OC1

10'

10-5

io- 6 '

10

10"

-7

0. 1

10-5

10-6

10-7

0. 1

STRTION=214 312:18:44 STRT]ON=, i i i i i i.=i 0.001

UP

10'

10 -6

10 10010

-7

10HZ HZ

1 I I I I llg Q.QQlfc I I I I 111

10"

21 1 rr 51 U

10-6

10 10010

-7

10HZ

= SO 'Www

0.001

10'

HZ

10 -6

10 10010

-7

10HZ HZ

UP

100

100

H = 90 :

I I I !

100


237

312:18: 19

100

312: 18:20 STST I C', = 21 8

100

0.1 1 10 100 10 100HZ HZ

Figure CIS. Station 218 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N20E and NllOE.

312:17:58O.Ole

10

0.001

STflTION»222 312:17:59 STRT10N-222 0.001

10HZ

10HZ

0.001

100 10HZ

UP

100

100

= SO :

100


t. O s

0.01

0.001 =

312:17:37

10

1Q- 7

0. 1

io - u

' 5

0.001

STRTICN=226 312:17:38 STfiTIGU=225 0.001

10HZ

10HZ

0.001

ICO 10HZ

UP

ICO

100

H = SO :

100

Figure 17. Station 226 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N20E and NllOE. _ _

312: 19:09 0.01P r

0.001

10"

10-5

10-6

0.1

0.01

C.001

c_j

10-5

10-6

0. 1

0.01

0.001

5

10-5

10-6

0. 1

STflTION=234 312:19:08 STFT ] CN' = 2 0.001

HZ

10HZ

10HZ

UP

100

H = 0

10"

0.001

10HZ

100

H = 90

10'

0.001

10HZ

10010

-IJ

10HZ

UP

100

100

H = 90

100

Figure CIS. Station 234 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N20E and N110E.

24]

312:18:21 SThTION=2U2

CJ

O.OOlE

10

10

10

312: 18:22 STfiT I 0'. =

0. 1HZ


24;

317:17:52 O.Olg i . i < .. |M

0.001 r

STRTION=379 317: 17:52 STRTION = 379

1 ' ... . .......

0. 1 10 300HZ


24 7:

0.01

0.001

317: 18: 16

10-u

10-5

10-6

10-7

0. 1

0.01=-

0.001

10-u

10

10

-5

-6

10-7

0. 1

0.01

0.001

10'

10-5

10-6

10-7

0. 1

STRTION=382 317:18:17 STRTION=362 0.001

10HZ

10HZ

10HZ

UP

10-u

10-5

-6

100

H = 0 :

10

0.001

10HZ

10-u

10-5

-6

100

= 90 :

10

0.001

10'

10HZ

10-5

10-B

10010

-7

10HZ

UP

100

100

H = 90 :

100

Figure C21. Station 382 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N25E and N115E. *

O.Ol

0.001

10'

317: 18:40

10-5

10-6

10-7

0.1

0.01

0.001

10'

10-5

10-6

10-7

0. 1

0.01

0.001

10-u

10-5

10-6

10-7

0. 1

STfiTIQN=385 317:18:41 STRT10N=385 0.001

10-14

10-5

10 100HZ

H = 0 :

10'

0.001

10"

5 io-5

io--6

UP

10 100HZ

-7

10 100HZ

H = 90 :

10

0.001

10'

1 ' ' ' '"i ' r ' ' ' "* H = 0 :

10 100HZ

10-6

10 10010

-7

= 90

10 100HZ HZ


245

317:19:13 STflTION=388O.OlE

317:19:m STflTION=388

1111111 - .......

1000.1 1 10 100 10HZ HZ

Figure C23. Station 388 in-situ velocity calibration spectra. Left: response to step in acceleration (seismometer mass released from rest at offset position). Right: response to delta function in velocity (voltage impulse applied to recorder input). From top: vertical, N25E and M15fc.

nm317: 19:42

10"

10-5

10-6

10-7

10-8

0. 1

0.001

10'

10-5

10'

10-7

0.1

0.001

10-4

10-6

10-7

0. 1

STflTION=391 317:19:43 STflTION=391rj i i i i i iii[ g 0.001

10HZ

10HZ

10HZ

UP

10'

ID'5

' 6

100

100

H = 90 :

ID

0.001

10'

5 io-5

ID' 6

io- 7

0.001

10"*

5 icr5

UP

10 100HZ

10 100HZ

10 -6

10010

-7

1 ' ""I

H = 90

10 100HZ


247

icr317: 19:40

10-5

10-6

10-7

0. 1

0.001

10'

LJ 10-5

10-6

10

10

-7

0. 1-li

10-5

10-6

10-7

0. 1

10HZ

10HZ

10HZ

STflTION=394 317:19:40 STRT10N=394 0.001

UP

10'

S ID"5

10-6

100

H = 0 :

100

H = 90

ID'7

0.001

10-"

10

10

10

0.001

10""

UP

10 100HZ

-5

-6

10 100 HZ

10-5

100

10

10'

-6

= 90

10 100HZ


0.01

0.001

317:19:04

10-u

10-5

10-6

10-7

0. 1

O.Olr-

0.001

10-11

2E (_)

10-5

10-6

10-7

0.1

0.01

0.001

ID-"

(_>

10-5

10-6

10-7

0. 1

STflTION=397 317:19:05 STRTIGN=397 0.001Tl l

UP

10-4

2E(_>

10-5

-6

10 100HZ

1 fillIMJ

H = 0

10

0.001

UP

10 100 HZ

10-4

10 100HZ

H = 90

5 io-5

10"6

10

0.001

H = 0

10 100 HZ

10-4

5 io-5

10-6

10 10010

-7

H = 90

10 100HZ HZ


317:18:28 O.Ole

0.001 r

10

10

10

0. 1

STRTION=303 317:18:29 STRTION=303 0.001

10'

10-5

10-6

10-7

UP

10 100

0.001HZ

10'

10-5

-610

0.001

10'

H = 0

10 100HZ

10-5

10-6

10-7

= 90

100 10 100HZ


25C

317: 18: 18O.Ole

10_n

STflTION=306 317:18:18 STRT10N=30S 0.001

0.01

0.001

10'

10-5

10-6

10-7

H = 0 :

-7

0.001

10"

10-5

-6

0. 1

O.Oli

10 100HZ

0.001

10'

10-5

10-6

10-7

H = 9Q :

10

0.001

10'

10-6

0. 1 10 10010

-7

HZ

UP

10 100HZ

H = 0 :

10 100HZ

H = 90

10 100HZ


317: 18:06O.Olp

0.001 --

0. 1

STfiTION=309 317:18:07 STflTION=3a9 0.001

100

10HZ

10HZ

10HZ

UP

100

100

= 90 =

100


252

317:17:52 O.OlE i r-r-r

O.OOlr

10

10

10

-14

0. 1

0.001

STflTION=312 317:17:53 STflTION=312 i i i . : MM 0.001

10HZ

10HZ

0.001

-7

100 10HZ

UP

100

100

H = 90

100


309: 17:49 lOOe r

STflTIQN=16M

10

1

0. 1

0.01

0.001

0. 1

UP

0. 1309:17:50 STflTION=164

0.01

to

0.001

100

10'

UP

10 .100

0. 1HZ

0.01

CD\2:LJ

0.001

100

10'

.,,...,, , .,,,,,«

10 100HZ

0. 1

0.01

CD\2:LJ

0.001

10'

= 90 :

100 10 100HZ

Figure Dl. Station 164 in-situ 18db acceleration calibration spectra. Left: response to step in acceleration (reset FBA servo amplifier reference voltage from non-zero). Right: response to delta function in acceleration (voltage impulse applied to recorder input). From top: vertical, N33W andN57E.

254

100

10

309: 18: 14

en>v

z:CJ

0. 1

0.01

0.0010. 1

100

10

CO v.2-LJ

0. 1

0.01

0.0010. 1

100

10

en\z:(LJ

0. 1

0.01

0.0010. 1

STflTION=166

10HZ

10HZ

10HZ

UP :

0. 1309: 18:15 STflTION=166

en

CJ0.01

100

H = 0 :

0.001

0. 1

0.01

100

H = 90

0.001

0. 1

en0.01

100

10HZ

10HZ

UP

100

H = 0

100

H = 90

0.001 1 ' ' ' ""10 100

HZ

Figure D2. Station 166 in-situ 6db acceleration calibration spectra. Left: response to step in acceleration (reset FBA servo amplifier reference voltage from non-zero). Right: response to delta function in acceleration (voltage impulse applied to recorder input). From top: vertical, N33W andN57W.

255

100

10

1

0. 1

0.01

0.001

309:18:39 STfiTION=168

10'

0. 1

100

10

CO

0. 1

0.01

0.001

en

10HZ

0. 1

UP

0.1309: 18:40 STRT10N=168

0.01

en\ 21 O

0.001

100

10'

UP

H = 0

0.1

0.01

0.001

100

10'

0.1

0.01

- 0.001

10-I*

10 100HZ

H = 0

10 100HZ

H = 90 :

100 10 100HZ

Figure D3. Station 168 in-situ 18db acceleration calibration spectra. Left: response to step in acceleration (reset FBA servo amplifier reference voltage from non-zero). Right: response to delta function in acceleration (voltage impulse applied to recorder input). From top: vertical, N33W and N57W.

256

100

10

312:20:29 STflTION=202 312:20:30 STflTION=202

CD V.Zu

0. 1

0.01

0.0010. 1

100

10

en

0. 1

0.01

0.001

en\ z u

0. 1 -

0.01 -

0.001

10HZ

10

i i I i i i e

UP

0. Ir

O.Olr

100

H = 0

0.001

0. 1

100

0.01

1000.001

0. 1

H = 0

10 100HZ

= CO

0.01

0.0010.1 1 10 100 10 100

HZ HZFigure D4. Station 202 in-situ 12db acceleration calibration spectra. Left: response to step in acceleration (reset FBA servo amplifier reference voltage from non-zero). Right: response to delta function in acceleration (voltage impulse applied to recorder input). From top: vertical, N20E and

257

100

10

312:19:09

CO

0.1

0.01

STflTION=234 312:19:09 STflTION=2340. 1

0. 1

100

10HZ

10

to

0. 1

0.010. 1

100

10HZ

10

0.1

O.Oi0. 1 10

HZ

UP

CO

100

H = 0

0.01

0. 1

UP

10 100HZ

CO

H = 0 -

n pi i i i i i i i i I_____i i i i i i i i

100 ' 10 100HZ

0. 1

H = 90

CO

1000.01

H = 90

10 100HZ

Figure D5. Station 234 in-situ 18db acceleration calibration spectra. Left: response to step in acceleration (reset FBA servo amplifier reference voltage from non-zero). Right: response to delta function in acceleration (voltage impulse applied to recorder input). From top: vertical, N20E andNHOE. 25 p

317; 19:42 STflTION=391

to-V 3E CJ

0.01 -

0.001

en \21 CJ

0.01 =

0.001

u-> \21 CJ

0. Ir

0.01-

100

0. 1317:19:43 STRTION=391

= CO

CJ0.01

0.001

0. 1

10 100HZ

= CO

CJ0.01

1000.001

0.1

H = 0

10 100HZ

= CO

- 00.01

H = 90 I

Q.OOll I I I I I I Ml I l_J LiJjJ I I I 1 I I II 0.001

0.1 1 10 100 10 100HZ . HZ

Figure D6. Station 391 in-situ 6db acceleration calibration spectra. Left: response to step in acceleration (reset FBA servo amplifier reference voltage from non-zero). Right: response to delta function in acceleration (voltage impulse applied to recorder input). From top: vertical, N25E and N115E.

united states department of the interior geological … · 2010. 12. 15. · united states...

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