comparisons of darfieldand christchurch ground...
TRANSCRIPT
![Page 1: Comparisons of Darfieldand Christchurch Ground …daveboore.com/presentations/boore_darfield_christchurch_nga-w1... · Comparisons of Darfieldand Christchurch Ground Motions with](https://reader031.vdocuments.mx/reader031/viewer/2022020215/5b58c3a27f8b9a527f8c900f/html5/thumbnails/1.jpg)
Comparisons of Darfield and pChristchurch Ground Motions with
NGA W1 GMPEsNGA‐W1 GMPEs
David M BooreDavid M. BooreWorkshop on Update of Pacific Northwest
Portion of the U.S. National Seismic Hazard MapsPortion of the U.S. National Seismic Hazard Maps (NSHMs)
March 21‐22, University of Washington, Seattle
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(http://www.geonet.org.nz/canterbury-quakes/)
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Stations for which Rjb<= 200 km
-42o
-41o40'
ate:
2012
-03-
17
Cl C it t
43o
-42o40'
-42o20'
42
e ap_r
_le_
200.
draw
;D
a
Most class C sites to the north
Class C sites at greater distance may have smaller depth of sediments than
-43o40'
-43o20'
-43o
Latit
ude
chris
tchu
rch_
stat
ion_
ma northsediments than
those near Christchurch
-44o40'
-44o20'
-44o
Christchurch (M 6.1)NEHRP class DNEHRP class Chypocenter
orks
hop_
21-2
2mar
12\c
170o 171o 172o 173o 174o-45o
Longitude
e:C
:\pac
nw_w
o
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1000 DarfieldChristchurchNEHRP B
NEHRP C 12-0
3-17
;Tim
e:16
:40
• Many sites with Vs30 = 275 and
500
m/s
)
NEHRP C
vs_r
jb.d
raw
;D
ate:
20660 m/s because values were estimated, not measured
• Distributions of Vs30 similar for both events
300
400
VS
30(m
NEHRP D
chur
ch_d
arfie
ld_v
s30_
v
• Most records with R<100 km are from class D sites
200
NEHRP E op_2
1-22
mar
12\c
hris
tc
1 10 100 1000
RJB (km)
:\pac
nw_w
orks
ho
Note: Some sites classified as “E” by Bradley & Cuprinovski (2011)
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Comparison of Darfield and Christchurch Ground Motions
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• Motions from both events at close distances are comparable
1 12-0
3-17
;Tim
e:16
:
• Apparently no or small site effect (but note difference in spatial locations for different class sites, so source effects could
1
(T=0
.2s)
(g)
2_ob
s.dr
aw;
Dat
e:20
1
compensate for site effects)
• Nonlinear soil response could have reduced motions for the larger event
0.1
ampe
dP
SA
urch
_dar
field
_psa
_t0.
2
Observed RotD50 reduced to
g
0.01
5%-d
NEHRP Class D (Darfield, M 7.0)NEHRP Class D (Christchurch, M 6.1)NEHRP Class C (Darfield, M 7.0)NEHRP Class C (Christchurch, M 6.1)
p_21
-22m
ar12
\chr
istc
huGMRotI50 using factors from Boore (2010); maximum effect is 4% at T=5 s.
In this and subsequent1 2 10 20 100 200
RJB (km)
\pac
nw_w
orks
hopIn this and subsequent
comparisons, the Y-axis spans three orders of magnitude.
Concentrate on H components, as the 2008 NGA GMPEs were only for H.
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1
12-0
3-17
;Tim
e:16
:
0.1
(T=1
.0s)
(g)
0_ob
s.dr
aw;
Dat
e:20
1
• Christchurch (M 6.1) class D motions comparable or even larger than Darfield (M 7.0) at close distances
0 01am
ped
PS
A
urch
_dar
field
_psa
_t1.
0• Darfield class C motions greater than Christchurch motions (R>50 km)
0.015%
-dNEHRP Class D (Darfield, M 7.0)NEHRP Class D (Christchurch, M 6.1)NEHRP Class C (Darfield, M 7.0)NEHRP Class C (Christchurch, M 6.1)
p_21
-22m
ar12
\chr
istc
hu
1 2 10 20 100 200
RJB (km)
\pac
nw_w
orks
hop
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0.1 12-0
3-17
;Tim
e:16
:
(T=5
.0s)
(g)
0_ob
s.dr
aw;
Dat
e:20
1
• Christchurch (M 6.1) class D motions now smaller than Darfield (M 7.0) at all distances
0.01
ampe
dP
SA
urch
_dar
field
_psa
_t5.
0• Apparent site effect small or not existent
0.0015%-d
NEHRP Class D (Darfield, M 7.0)NEHRP Class D (Christchurch, M 6.1)NEHRP Class C (Darfield, M 7.0)NEHRP Class C (Christchurch, M 6.1)
p_21
-22m
ar12
\chr
istc
hu
1 2 10 20 100 200
RJB (km)
\pac
nw_w
orks
hop
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Comparison of Observed Motions and Motions from NGA‐Motions and Motions from NGA
W1 GMPEs: Darfield
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Darfield (M 7.0)
Dat
e:20
12-0
3-21
;
• Reddish GMPEs for class D
• Bluish GMPEs for class C
Don’t try to follow curves for individual1
(T=0
.2s)
(g)
mpe
s_bl
ue_r
ed.d
raw
;
• Overall comparison good
• Don’t try to follow curves for individual GMPEs
0.1
ampe
dPS
A
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/sBA08 Vs30=275 m/s _o
bs_n
ga_r
_le_
200.
gm
Overall comparison good
• Apparent lack of site effect in data is consistent with GMPEs
0.01
5%-d BA08, Vs30=275 m/s
CB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s
ar12
\dar
field
_psa
_t0.
2_
1 2 10 20 100 200
RJB (km)
orks
hop_
21-2
2ma
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1Darfield (M 7.0)
Dat
e:20
12-0
3-21
;
0.1(T=1
.0s)
(g)
mpe
s_bl
ue_r
ed.d
raw
;
• Note separation in observed class D values; GMPEs predictions between the two groups
0.1
ampe
dPS
A
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/sBA08 Vs30=275 m/s _o
bs_n
ga_r
_le_
200.
gm• Site effect in GMPEs, but not apparent in observations (but little overlap in distance range for class C and D)
0.015%
-d BA08, Vs30=275 m/sCB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s
ar12
\dar
field
_psa
_t1.
0_
1 2 10 20 100 200
RJB (km)
orks
hop_
21-2
2ma
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Darfield (M 7.0)
Dat
e:20
12-0
3-21
;
0.1
(T=5
.0s)
(g)
mpe
s_bl
ue_r
ed.d
raw
;
• GMPEs underpredict observations (except class C at greater distances)
• Site effect in GMPEs, but not
0.01
ampe
dPS
A
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/sBA08 Vs30=275 m/s _o
bs_n
ga_r
_le_
200.
gmapparent in observations (but little overlap in distance range for class C and D)
0.001
5%-d BA08, Vs30=275 m/s
CB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s
ar12
\dar
field
_psa
_t5.
0_
1 2 10 20 100 200
RJB (km)
orks
hop_
21-2
2ma
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Comparison of Observed Motions and Motions from NGA‐Motions and Motions from NGA
W1 GMPEs: Christchurch
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1
Christchurch (M 6.1)
;D
ate:
2012
-03-
2
1
A(T
=0.2
)(g)
gmpe
s_bl
ue_r
ed.d
raw
• Overall comparison good
• Apparent lack of site effect in data is consistent with GMPEs
0.1
dam
ped
PS
A
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/sBA08 Vs30=275 m/s .2
_obs
_nga
_r_l
e_20
0.
0.01
5%-d BA08, Vs30=275 m/s
CB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s
12\c
hris
tchu
rch_
psa_
t0
1 2 10 20 100 200
RJB (km)
ksho
p_21
-22m
ar1
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1 Christchurch (M 6.1)
;D
ate:
2012
-03-
2
0.1
A(T
=1.0
)(g)
gmpe
s_bl
ue_r
ed.d
raw
• GMPEs tend to underpredict class D motions at close distances
• Site effect in GMPEs, but not
0 01dam
ped
PS
A
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/sBA08 Vs30=275 m/s .0
_obs
_nga
_r_l
e_20
0.apparent in observations (but little overlap in distance range for class C and D)
0.015%
-d BA08, Vs30=275 m/sCB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s
12\c
hris
tchu
rch_
psa_
t1
1 2 10 20 100 200
RJB (km)
ksho
p_21
-22m
ar1
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0.1Christchurch (M 6.1)
;D
ate:
2012
-03-
2
0.01A(T
=5.0
)(g)
gmpe
s_bl
ue_r
ed.d
raw
• GMPEs severely underpredict observations at shorter distances
• Agreement better for greater 0.01
dam
ped
PS
A
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/sBA08 Vs30=275 m/s .0
_obs
_nga
_r_l
e_20
0.distances
• Site effect in GMPEs, but not apparent in observations (but little overlap in distance range for class C
0.0015%-d BA08, Vs30=275 m/s
CB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s
12\c
hris
tchu
rch_
psa_
t5and D)
1 2 10 20 100 200
RJB (km)
ksho
p_21
-22m
ar1
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Sensitivity of Predicted T=5 s PSA to sediment depth and toto sediment depth and to
magnitude
![Page 18: Comparisons of Darfieldand Christchurch Ground …daveboore.com/presentations/boore_darfield_christchurch_nga-w1... · Comparisons of Darfieldand Christchurch Ground Motions with](https://reader031.vdocuments.mx/reader031/viewer/2022020215/5b58c3a27f8b9a527f8c900f/html5/thumbnails/18.jpg)
• Show AS08 and class D onlyShow AS08 and class D only
• Z1.0=1000 m from Bradley & Cuprinovski (2011)
• M 6 33 from Holden (2011) 0.1Christchurch (M 6.1)
2_6.
33.d
raw
;D
M 6.33 from Holden (2011)
• Use of these data in NGA-W2 without Z1.0 and larger M could result in biased results. T=
5.0)
(g)
ompa
re_z
sed.
add_
m6.
2
• Does Z1.0 vary spatially, with it being smaller for stations at greater distances? If so, this would help explain the
0.01
ampe
dPS
A(T
00.c
lass
_d_a
s_on
ly.c
o
p pdiscrepancy at greater distance. This could also be due to a difference in geometrical spreading due to lateral changes in crustal structure
0.0015%-d
aNEHRP Class DAS08, Vs30=275 m/s, Z1.0=480 mAS08, Vs30=275 m/s, Z1.0=1000 mAS08, as above, M 6.2AS08, as above, M 6.33
_t5.
0_ob
s_ng
a_r_
le_2
in crustal structure.
1 2 10 20 100 200
RJB (km)
r12\
chris
tchu
rch_
psa_
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Vertical MotionVertical Motion
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(Fry et al., 2011)
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(Bradley & Cuprinovski, 2011)
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Effects Producing Spatial Variability inEffects Producing Spatial Variability in Ground Motions
•Source: Radiation Pattern & Directivity•Path: volcanic vs sedimentsPath: volcanic vs sediments•Basin Waves•Sediment Depth•Shallow Site Response
•LinearN li•Nonlinear
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Fault Normal and Fault Parallel Velocity Time Seri
00
HVSC,Fault Normal,158
00
CMHS,Fault Normal,158
00
PRPC,Fault Normal,158SHLC,Fault Normal,158
0 20 40 60 80
-100
050
10
Time (Sec)
Vel
ocity
(cm
/s)
HVSC F lt P ll l 68
0 20 40 60 80
-100
050
10
Time (Sec)
Vel
ocity
(cm
/s)
CMHS F lt P ll l 68
0 10 20 30 40 50
-100
050
10Time (Sec)
Vel
ocity
(cm
/s)
PRPC F lt P ll l 68
10 20 30 40
Time (Sec)
SHLC F lt P ll l 68 CMHSCMHSPRPCPRPCSHLCSHLC
HVSCHVSCSHLC, PRPC,CMHSSHLC, PRPC,CMHS0 20 40 60 80
-100
050
100
Time (Sec)
Velo
city
(cm
/s)
HVSC,Fault Parallel,68
0 20 40 60 80
-100
050
100
Time (Sec)
Velo
city
(cm
/s)
CMHS,Fault Parallel,68
0 10 20 30 40 50
-100
050
100
Time (Sec)
Velo
city
(cm
/s)
PRPC,Fault Parallel,68
10 20 30 40
Time (Sec)
SHLC,Fault Parallel,68 CMHSCMHS
LPCCLPCC
S C, C,C SS C, C,C S
5010
0
cm/s
)
LPCC,Fault Normal,158
65° Dip0 20 40 60 80
-100
0
Time (Sec)
Vel
ocity
(c
100
LPCC,Fault Parallel,68
0 20 40 60 80
-100
050
1
Time (Sec)
Velo
city
(cm
/s)• Drastic change in frequency
content going from sites on rock (HVSC & LPCC) to sites oc ( SC & CC) to s teson Quaternary sediments.
(from B. Chiou)
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Evidence for Nonlinear Soil Response
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0.5
1
g
NNBS
Tim
e:21
:09:
00
-0.5
0
as7
7wg
w;
Dat
e:20
12-0
3-17
;T
10 15 20 25-1
0
0.5g 2_
NN
BS
_V2A
.xls
.dra
w
-0.5
0
as1
3eg
011\
2011
0221
_235
142
10 15 20 25-1
0.5
1
g eala
nd_c
hris
tchu
rch_
2
-0.5
0
aup
g
File
:C:\n
ew_z
e
10 15 20 25-1
Time (s)
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200
400
/s)
2001 M 6.8 Nisqually (SDS)
NS
-200
0
200
Acc
el(c
m/s
/
me:
08:0
9:29
20 30 40 50-400
200
400/s
) EW
Dat
e:20
12-0
3-18
;Tim
-200
0
Acc
el(c
m/s
/
_200
1\sd
s_un
filt.d
raw
;
(see Frankel et al., 2002, for details)
20 30 40 50-400
100
200
s/s)
UD File
:C:\n
isqu
ally
_
-100
0
Acc
el(c
m/s
20 30 40 50-200
Time (s)
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Negative vertical accelerations are “clipped”. This may be due to a different nonlinear process than that producing the cusps shown in the previous figures.
(Fry et al., 2011)
p g
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Conclusions• M 7.0 Darfield and M 6.1 Christchurch motions similar
for close distances, short periods• M 7.0 Darfield motions higher than M 6.1 Christchurch
motions for longer periods (as expected from the difference in magnitudes)
• Site response not too obvious, but this may be because of the different spatial distributions of the site classes (most close sites are class D)
• Observed motions influenced by many effects, including• Lateral changes in geology• Local linear and nonlinear site response
B i (?)• Basin waves (?)
• GMPEs are in reasonable agreement with observations for close distances, short periods
d di l i d i i• GMPEs underpredict longer period motions, using metadata in current NGA‐W2 flatfile
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ENDEND
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From B. Chiou, Source: GNS Science
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(Bradley & Cuprinovski, 2011)
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(Bradley & Cuprinovski, 2011)
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Directivity Effect and Velocity Pulse
HVSCHVSC
SHLC, PRPC,CMHSSHLC, PRPC,CMHSLPCCLPCC
S C, C,C SS C, C,C S
65° Dip
Source: George Walker
(from B. Chiou)
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(Bradley & Cuprinovski, 2011)
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(Bradley & Cuprinovski, 2011)
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0282 Christchurch, New Zealand
3.4
-43
)SHLC
PRPC
CMSH
-43.
6La
titud
e (° CMSH
HVSC
LPCC
-43.
8
172 4 172 6 172 8 173172.4 172.6 172.8 173Longitude (°)
(from B. Chiou)
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Fault RuptureFault Rupture
• Reverse faulting on a buried faultReverse faulting on a buried fault• Assumed fault plane
St ik 68° (f USGS CMT)– Strike = 68° (from USGS CMT)– 65 ° dip, to the south
( )– Top of rupture is at 2 km depth (assumed)– Bottom of rupture is at 12 km (assumed)– Rupture length ~ 15 km (length of the aftershock zone).
(from B. Chiou)
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300
2001 Nisqually, Washington, earthquake (M 6.8)
SDS (NS) filt d SDS filt d f 10 20 H
0
100
200
on(c
m/s
ec2 )
0
50
11:0
4:41
SDS (NS): unfiltered SDS: filtered from 10--20 Hz
• SDS within 200 m of SDN
-300
-200
-100
Acc
eler
ati
-50
filt_
filt.d
raw
;D
ate:
2003
-09-
17;
Tim
e:• liquefaction at SDS, not at SDN• Note cusps at SDS and increased
20 30 40 50 20 30 40 50
100
200
300
m/s
ec2 )
50
\rec_
proc
_stro
ng_m
otio
n\sd
s_sd
n_un
f
SDN: filtered from 10--20 HzSDN (NS): unfiltered
amplitude at high frequencies
200
-100
0
100
ccel
erat
ion
(cm
50
0
File
:C:\m
etu_
03\
20 30 40 50-300
-200
Time (sec)
Ac
20 30 40 50
-50
Time (sec)
(after Frankel et al., 2002)
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0.1Christchurch (M 6.1)
d.dr
aw;
Dat
e:20
0 01(T=5
.0)(
g)
blue
_red
.com
pare
_zse
d
0.01
dam
ped
PS
A
NEHRP Class DNEHRP Class C ga
_r_l
e_20
0.gm
pes_
b
0.0015%-d
NEHRP Class CAS08, Vs30=275 m/s, Z1.0=480 mAS08, Vs30=275 m/s, Z1.0=1000 mCB08, Vs30=275 m/s, Z1.0=326 mCB08, Vs30=275 m/s, Z1.0=1000 mCY08, Vs30=275 m/s, Z2.5=2.5 kmCY08, Vs30=275 m/s, Z2.5=4.1 km hu
rch_
psa_
t5.0
_obs
_n
1 2 10 20 100 200
RJB (km)
2.5
1-22
mar
12\c
hris
tch
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0.1Christchurch (M 6.1)
_m6.
2.dr
aw;
Dat
0 01(T=5
.0)(
g)
ed.c
ompa
re_z
sed.
add_
0.01
dam
ped
PS
A
NEHRP Class DNEHRP Class C _l
e_20
0.gm
pes_
blue
_re
0.0015%-d
NEHRP Class CAS08, Vs30=275 m/s, Z1.0=480 mAS08, Vs30=275 m/s, Z1.0=1000 mAS08, as above, M 6.2CB08, Vs30=275 m/s, Z1.0=326 mCB08, Vs30=275 m/s, Z1.0=1000 mCY08, Vs30=275 m/s, Z2.5=2.5 km _p
sa_t
5.0_
obs_
nga_
r_
1 2 10 20 100 200
RJB (km)
CY08, Vs30=275 m/s, Z2.5=4.1 km
mar
12\c
hris
tchu
rch_
![Page 42: Comparisons of Darfieldand Christchurch Ground …daveboore.com/presentations/boore_darfield_christchurch_nga-w1... · Comparisons of Darfieldand Christchurch Ground Motions with](https://reader031.vdocuments.mx/reader031/viewer/2022020215/5b58c3a27f8b9a527f8c900f/html5/thumbnails/42.jpg)
(Bradley & Cuprinovski, 2011)
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-41o40'Darfield (M 7.0)
NEHRP class DNEHRP l C
2012
-03-
17;T
-42o40'
-42o20'
-42o NEHRP class Chypocenter
_r_l
e_20
0.dr
aw;
Dat
e:
Stations for which Rjb<= 200 km
-43o40'
-43o20'
-43o
Latit
ude
\dar
field
_sta
tion_
map
_
-44o40'
-44o20'
-44o
wor
ksho
p_21
-22m
ar12
\
169o 170o 171o 172o 173o 174o-45o
Longitude
le:C
:\pac
nw_w
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1
03-1
7;Ti
me:
16:1
5
0.1) bs.d
raw
;D
ate:
2012
-0
PG
A(g
hurc
h_da
rfiel
d_pg
a_ob
0.01
NEHRP Class D (Darfield, M 7.0)NEHRP Class D (Christchurch, M 6.1)NEHRP Class C (Darfield, M 7.0)NEHRP Class C (Christchurch, M 6.1)
op_2
1-22
mar
12\c
hris
tch
1 2 10 20 100 200
RJB (km)
C:\p
acnw
_wor
ksho
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1
2-03
-17;
Tim
e:16
:
0.1(T
=2.0
s)(g
)
_obs
.dra
w;
Dat
e:20
12
0.01ampe
dP
SA
(
rch_
darfi
eld_
psa_
t2.0
_
5%-d
a
NEHRP Class D (Darfield, M 7.0)NEHRP Class D (Christchurch, M 6.1)NEHRP Class C (Darfield, M 7.0)NEHRP Class C (Christchurch, M 6.1)
_21-
22m
ar12
\chr
istc
hur
1 2 10 20 100 2000.001
RJB (km)
\pac
nw_w
orks
hop_
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100
03-1
7;Ti
me:
16:1
5
10
/s)
bs.d
raw
;D
ate:
2012
-0
PG
V(c
m/
hurc
h_da
rfiel
d_pg
v_ob
1
NEHRP Class D (Darfield, M 7.0)NEHRP Class D (Christchurch, M 6.1)NEHRP Class C (Darfield, M 7.0)NEHRP Class C (Christchurch, M 6.1)
op_2
1-22
mar
12\c
hris
tch
1 2 10 20 100 200
RJB (km)
C:\p
acnw
_wor
ksho
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Observed RotD50
1 Darfield (M 7.0)
te:2
012-
03-2
0;Ti
m
Observed RotD50 reduced to GMRotI50 using factors from Boore (2010); maximum effect is 4% at T=5 s. 0.1) s_
blue
_red
.dra
w;
Dat
at 5 s
In this and subsequent comparisons, the Y-axis spans three orders of magnitude.
PG
A(g
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/s s_
nga_
r_le
_200
.gm
pes
Concentrate oh H components, as the 2008 NGA GMPEs were only for H.
0.01 BA08, Vs30=275 m/sCB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s
mar
12\d
arfie
ld_p
ga_o
bs
1 2 10 20 100 200
RJB (km)
,
_wor
ksho
p_21
-22m
![Page 48: Comparisons of Darfieldand Christchurch Ground …daveboore.com/presentations/boore_darfield_christchurch_nga-w1... · Comparisons of Darfieldand Christchurch Ground Motions with](https://reader031.vdocuments.mx/reader031/viewer/2022020215/5b58c3a27f8b9a527f8c900f/html5/thumbnails/48.jpg)
1Darfield (M 7.0)
Dat
e:20
12-0
3-20
;
0 1(T=2
.0s)
(g)
pes_
blue
_red
.dra
w;
D
0.1
ampe
dP
SA
(
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/s ob
s_ng
a_r_
le_2
00.g
mp
0.01
5%-d
a BA08, Vs30=275 m/sCB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s r1
2\da
rfiel
d_ps
a_t2
.0_o
1 2 10 20 100 200
RJB (km)
,
orks
hop_
21-2
2mar
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100
Darfield (M 7.0)
te:2
012-
03-2
0;Ti
m
100
/s)
s_bl
ue_r
ed.d
raw
;D
at
10
PG
V(c
m/
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/s s_
nga_
r_le
_200
.gm
pes
1
BA08, Vs30=275 m/sCB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s m
ar12
\dar
field
_pgv
_obs
1 2 10 20 100 200
RJB (km)
,
_wor
ksho
p_21
-22m
![Page 50: Comparisons of Darfieldand Christchurch Ground …daveboore.com/presentations/boore_darfield_christchurch_nga-w1... · Comparisons of Darfieldand Christchurch Ground Motions with](https://reader031.vdocuments.mx/reader031/viewer/2022020215/5b58c3a27f8b9a527f8c900f/html5/thumbnails/50.jpg)
1 Christchurch (M 6.1)
Dat
e:20
12-0
3-21
;
0.1) pes_
blue
_red
.dra
w;
D
PG
A(g
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/s ob
s_ng
a_r_
le_2
00.g
mp
0.01 BA08, Vs30=275 m/sCB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s r1
2\ch
ristc
hurc
h_pg
a_o
1 2 10 20 100 200
RJB (km)
,
orks
hop_
21-2
2mar
![Page 51: Comparisons of Darfieldand Christchurch Ground …daveboore.com/presentations/boore_darfield_christchurch_nga-w1... · Comparisons of Darfieldand Christchurch Ground Motions with](https://reader031.vdocuments.mx/reader031/viewer/2022020215/5b58c3a27f8b9a527f8c900f/html5/thumbnails/51.jpg)
1Christchurch (M 6.1)
Dat
e:20
12-0
3-2
0.1(T
=2.0
)(g)
mpe
s_bl
ue_r
ed.d
raw
;
0.01
dam
ped
PS
A
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/s 0_
obs_
nga_
r_le
_200
.g
5%-d BA08, Vs30=275 m/s
CB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s 2\
chris
tchu
rch_
psa_
t2.0
1 2 10 20 100 2000.001
RJB (km)
,
ksho
p_21
-22m
ar12
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100 Christchurch (M 6.1)
Dat
e:20
12-0
3-21
;
10
/s)
pes_
blue
_red
.dra
w;
D
1
PG
V(c
m/
NEHRP Class DNEHRP Class CAS08, Vs30=275 m/s ob
s_ng
a_r_
le_2
00.g
mp
1 BA08, Vs30=275 m/sCB08, Vs30=275 m/sCY08, Vs30=275 m/sAS08, Vs30=660 m/sBA08, Vs30=660 m/sCB08, Vs30=660 m/sCY08, Vs30=660 m/s r1
2\ch
ristc
hurc
h_pg
v_o
1 2 10 20 100 200
RJB (km)
,
orks
hop_
21-2
2mar
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(Fry et al., 2011)