Network Topology Instruments

Volcanic Monitoring “El Colima”

Seismic stations sheds for housing equipment at each site

AHRJSMTJ

TOWER JUAJ TOWER CAFJ TOWER SMTJ TOWER CUC TOWER CPRJ

Network Infraestrure

GPS Antenna

Camera

Telecommunicationstower

Router

NASSwitch

Real-time recorder& Data processing

Server AcquisitionAntelope

3D Seismometer

Accelerometer

Datalogger

Seismic Station Infrastructure

Switch

Net R9

Choke RingAntenna

Battery

Solar Panel

INTERNET

Seismic Station “RESAJ”

University Campus

Centro de Sismología y Volcanología de Occidente.Centro Universitario de la Costa

U de G

Abstract

The Jalisco region of western Mexico is the locus of interaction among the North America,

Cocos, and Rivera plates, giving rise to the Jalisco block. This region is one of the most

tectonically active in Mexico, and here took place the largest instrumentally recorded

earthquake in Mexico the twentieth century, on 3 June 1932 (M 8.2), three important tsunamis

in the last 100 yrs, and two of the most active volcanoes in Mexico.

Nevertheless, the first seismicity studies here, undertaken with temporary networks, did not commence until 1994. In 2008, the Government of Jalisco and the University of Guadalajara funded a research project to install a seismic network in this region. The principal objective was to study the seismic hazard in the region and characterize seismic parameters in the different areas to design building codes.

The Red Sísmica y Acelerométrica Telemétrica de Jalisco (RESAJ) project was thus initiated in 2009. Its Central Lab is at Centro de Sismología y Volcanología de Occidente (SisVOc), located at the Universidad de Guadalajara in Puerto Vallarta. Currently, the RESAJ has 26 telemetered and 2 autonomous stations. The RESAJ serves as the seismological lab for the postgraduate program at SisVOc.

The Rivera plate is a micro plate acting independiently since 10 Ma (DeMets and Traylen,

2000). According to Núñez-Cornú et al. (2002), the North America, Pacific, Cocos, and Rivera

lithospheric plates interact in the western Mexican volcanic belt. The existence of a tectonic unit

in this region, known as the JB, has been proposed by several researchers (Luhr et al., 1985;

Bourgois et al., 1988; DeMets and Stein, 1990; Allan et al., 1991; Garduño and Tibaldi 1991).

The JB is limited to the east by the Colima rift zone, which extends northward from the Pacific

coast and connects at its northern end with two other major extensional structures: the Tepic-

Zacoalco rift zone (TRZ; trending roughly northwest–southeast), defined as the northern

boundary of the JB, and the Chapala rift zone (trending roughly east–west). The connection

between the northwestern border of the JB and the continent (the Tamayo fault system) is not

well defined. This border has been related to the San Blas fault as continuation of the TRZ, or to

the Islas Marias Escarpment (IME), west of Tres Marias Islands.

The UdeG and PCJal began to deploy the Red Sismológica de Jalisco (RESJAL) in late 2001. The RESJAL

included 10 digital 3D seismograph station of which six were telemetered and four were autonomous. The

network included sites on Colima and Ceboruco volcanoes. RESJAL operated only until late 2004. The government of the state of Jalisco approved funds in 2008 to develop a seismic network to study the

seismic hazard associated with tectonic processes in Jalisco to better assess the regional seismic risk and aid

in the design of adequate building codes.By mid-2009, the Jalisco Seismic Accelerometric Telemetric Network (RESAJ) was thus initiated. The criteria

for the selection of the sites in the deployment of the stations were:

• Distribution according to seismicity pattern reports in previous works (Núñez-Cornú et al., 2002, 2004), • Access to telemetry (line of view) or internet, • Security of the instruments, and • Seismic noise

Eleven of the seismic stations RESAJ will have a Global Positioning System and Volcanic Monitoring:

Ÿ Quanterra Q330-6ch or Q330S-6ch DAS digitizer, 24 bit A/D.Ÿ Lennartz LE3D 1Hz Seismometer (Lennartz Electronic GmbH, 2016).Ÿ Kinemetrics triaxial accelerometer episensor Model FBA ES-T .Ÿ Digitizer Trimble Net R9.Ÿ GNSS (Global Navigation Satellite System ) Choke Ring Antenna.Ÿ Solar power supply.Ÿ Camera ACTi b44.

The data are transmitted to the Central Lab at Centro de Sismología y Volcanología de Occidente (SisVOc) in Puerto Vallarta.

A Wide Area Network (WAN) was the topology used for comunication, with distances from 25 to 120 km. In

some cases, the ISP service was used from the seismic station, configuring the Virtual Private Network router

(VPN).

Configurations of point-to-point and multipoint links, redundant links and back-up gateways with ISP

(Internet Service Provider) providers alternate to the WAN.

Within the OSI (Open Systems Interconnection) model, we use Layer 2 Switch and 3 Routers of wired and

wireless type

The devices work free band frequencies in Mexico within the ranges of 900Mhz (902-928 MHz) and in the

5Ghz band (5.15-5.35, 5.4-5.7 Ghz) according to the requirements.

The video is monitored and stored in real time in NVR, where the fumarole height measurement is carried

out.

Data are handled by the Antelope System software (Lindquist et al., 2007): Ÿ Sampling rate for seismometers is 100 Hz.Ÿ Sampling rate for accelerometers is 200 Hz.

Data are GNSS Trimble:

Ÿ Sampling rates are 0.06, 2, and 50 Hz.

Data of the Volcanic Monitor:

Ÿ Stored in NVR.Ÿ Sampling rate 60 fps.

TheJaliscoSeismicAccelerometricTelemetricNetwork(RESAJ)

SisVOc

Session: Regional Seismic Network Approaches and Stakeholder Collaborations

Room: Riverfront South

Date: may 16th, 2018

SandovalHernandezJuanManuel,NunezCornuFranciscoJavier,JoseEdgarAlarconSalazar.,SuarezPlasenciaCarlos,NunezEscribanoDiana,TrejoGomezElizabeth,GomezHernandeA� dan.

Affiliations:

(1) Centro de Sismología y

Volcanología de Occidente -

Universidad de Guadalajara

* Corresponding author:Juan M. Sandoval Hdez.

Mail: ajuansandoval@hotmail.com

Location of Seismic Station

ACKNOWLEDGEMENTS: This Research is funded by : CONACyT–FOMIXJal 2008-96567 (2009), CONACyT–FOMIXJal 2008-96539 (2009), CONACyT–FOMIXJal 2010-149245 (2010), and Universidad de Guadalajara (UdeG) internal projects; Edgar Alarcón was funded by a master scholarship from CONACYT, CVU 659870, Reg 421800. The authors thank H. Ayuntamiento de El Tuito, Jal., H. Ayuntamiento de Pihuamo, Jal., H. Ayuntamiento de Zapotitlán de Vadillo, Jal., H. Ayuntamiento de San Gabriel, Jal., H. Ayuntamiento de Puerto Vallarta, H. Ayuntamiento de San Sebastián del Oeste, Jal., and Unidad Municipal de Protección Civil de Tuxpan, Jal., for supporting to build the sheds. Unidad Estatal de Protección Civil y Bomberos de Nayarit y Unidad Estatal de Protección Civil y Bomberos de Jalisco for logistical support. The authors also acknowledge to Teléfonos de Mexico and C4 Gobierno de Nayarit for the facilities to transmit the data.

Figure 2. Tectonic framework of western Mexico: Rivera and Cocos plates subducting beneath the North American plate and transform faults zones associated with spreading. SBF, San Blas fault (proposed); IME, Islas Marías Escarpment; SC, Sierra de Cleofas; BC, Banderas Canyon; IC, Ipala Canyon; BFB, Banderas fore-arc block.

Figure 3. Distribucion of Seismic Stations.

Figure 4. WAN Topology RESAJ .

Figure 1. Seismotectonic framework along the Jalisco coast (modified from Trejo-Gómez et al., 2015). RFZ, Rivera fault zone; CRZ, Colima rift zone; TRZ, Tepic–Zacoalco rift zone; a, Armería River; b, Cohuayana River; MIA, maximum intensity areas for earthquakes in 1932 (dates and magnitudes indicated); and AA, aftershocks areas. Circles indicate llocations of cities, and stars show the epicenters of the 4 December 1948 and the 2003 Armería earthquakes; seismic gaps proposed; green triangles indicate Red Sismológica de Jalisco (RESJAL) stations; blue squares indicate Colima Seismic Telemetric Network (RESCO) stations; inverted blue triangle indicates.

CORJ LLAJSANJ

JAPJ AUTJ

CPRJ

JBAJ AHRJ

JaliscoBlock

CocosPlate

Pacific Plate

RiveraPlate

21°

Islas Marías

-103° -101°-105°-107°-109°17°

19°

1. Sanganguey Volcano2. Ceboruco Volcano3. Tequila Volcano4. Caldera La Primavera5. Nevado de Colima6. Colima Volcano

North AmericaPlate

?

Main Volcanic Structures

Main Tectonic Features

12

3

4

5

6

L. de Chapala

Fosa de Barra de Navidad

A

B

C

D

F

A. Tepic-Zacoalco Rift ZoneB. Chapala Rift ZoneC. Colima Rift ZoneD. Valle de Banderas or Vallarta Graben(?) E. Bahia de BanderasF. El Gordo Graben

Middle America Trench

Rivera FZ

Paci

fic

- Riv

era

Ris

e

Tamayo FZ

SBF

IME

E

SC

BC

BFB

IC

0 100 200 km

N

MZCJ

SMTJ

Seismological Station

Tepic

Guadalajara

NorthAmerican Plate

Manzanillo

TRZ

CRZ

Jalisco Block

b

a

Rupture Areafor 1932 Events

Vallarta Gap

Colima Gap

Bahía de Banderas

MIA 19320603 (8.2)

MIA 19320618 (7.8)

1995 AA

1973 AA

Zapotitlan

RFZ

Rivera Plate

Cocos Plate

Middle American Trench

22.0

021.0

020.0

019.0

018.0

0

Latit

ude

-107.00 -106.00 -105.00 -104.00 -103.00

Longitude

1948

2003

Colima

Tecoman

Cd G

uzm

an

Pto Vallarta

Tectonic Setting