PEER NGA-WEST2 DATABASE NGA-WEST2 DATABASE SWUS GMC SSHAC WORKSHOP #1 March 19-21, 2013 Oakland, ......
Transcript of PEER NGA-WEST2 DATABASE NGA-WEST2 DATABASE SWUS GMC SSHAC WORKSHOP #1 March 19-21, 2013 Oakland, ......
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PEER NGA-WEST2
DATABASE
SWUS GMC SSHAC WORKSHOP #1
March 19-21, 2013
Oakland, California
Robert B. Darragh
Pacific Engineering & Analysis
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PEER NGA-West2 Database
Timothy D. Ancheta
Pacific Earthquake Engineering Research Center
Robert Darragh
Pacific Engineering and Analysis, Inc.
Jonathan P. Stewart
Emel Seyhan
University of California, Los Angeles
Walter Silva
Pacific Engineering and Analysis, Inc.
Brian Chiou
California Department of Transporation
Katie Wooddell
Pacific Gas & Electric, Inc.
Robert Graves
United States Geologic Survey
Albert Kottke
Pacific Earthquake Engineering Research Center
David M. Boore
United States Geologic Survey
Tadahiro Kishida
Pacific Earthquake Engineering Research Center
Jennifer L. Donahue
Geosyntec Consultants
PEER Report 2013/01
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PEER NGA-West 2
● 21192 three-component records
● 599 shallow crustal events
● Small-to-moderate magnitude (CA)
● M from 3 to 7.9
● Rrup from 0.05 to 1533 km.
● Vs30 from 94 to 2100 m/sec.
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Map of the epicentral distribution of the 335 selected world-
wide events included in the NGA-West2 database. Open circles
(blue) are events in the previous NGA-West1 database and
solid stars (red) are events added in the NGA-West2 database.
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Hypocenter Locations of the 276 events selected in the SMM data
set. Boundary separates the NCSN from SCSN. Events to the north
(blue) of boundary preferred metadata from NCSN\BDSN. Events to
the south of boundary(red) preferred metadata from SCSN\CIT.
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Magnitude-distance distribution of strong-motion records in the
NGA-West2 database. Open blue squares are stations included in
the NGA-West1. Solid red squares are stations added from
worldwide events. Orange triangles are stations added from
California only from small-to-moderate magnitude events. 6
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Highest useable period versus period using records included in
both NGA-West1 (dashed black) and West-2 (solid red). The NGA-
West2 database more than doubles the size of the previous NGA
database for moderate-to-large magnitude events M > 6 . 7
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Comparison of the period set used in the NGA-West1project and
the NGA-West2 project. Red triangles along the NGA-West2 line
represent new periods added. The red triangle along the NGA-
West1 line represents a period removed. 8
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Pie-charts of station numbers in 2006 and 2013 site
database for 5 main regions. CH: China, JP: Japan, Med:
Mediterranean, TW: Taiwan, WNA: Western North America
(i.e., mostly California).
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Histograms of measured and inferred Vs30 at the
recording station sites in both the 2006 and 2013
site databases. 10
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Histogram of profile depth bins by region. Profile depths for Japan
extend up to 365 m, but are concentrated at 100m in the figure. Note
that there is one station with zp = 82m in Japan.
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Style of Faulting Classification based on Rake Angle 12
0
-30
-60
-90
-120
-150
-180
180
150
120
90
60
30
Strike-Slip
Strike-Slip
Reverse
Reverse-
Oblique
Reverse-
Oblique
Normal-
Oblique
Normal-
Oblique
Normal
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STYLE OF FAULTING
Style 3<M<4 4<M<5 5<M<6 6<M< 7 M>7 TOTAL
SS 4277 5293 1101 1140 785 58%
NM 199 125 169 113 0 3%
RV 506 877 778 2847 74 24%
RV-O 488 360 511 211 683 10%
NM-O 413 518 65 4 0 5%
TOTAL 28% 33% 12% 20% 7%
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Definitions of the ΔRJB and CRJB distance metrics. 14
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An earthquake may rupture a segment of the
fault adjacent to the segment that ruptured in
the mainshock. This gives a small (or zero)
ΔRJB while the majority of the rupture plane
is located on a separate segment and may
be much further from the mainshock rupture.
Wooddell and Abrahamson modified the
metric to use the shortest distance between
the centroid of Joyner-Boore rupture surface
of the potential Class 2 earthquakes.
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Example of identification of Class 1 and Class 2 earthquakes for the 2008 Wenchuan, China Class 1
mainshock using a maximum CRJB of 5 kilometers for defining Class 2 earthquakes. The red stars
are the Class 1 earthquakes, and the blue circles show the centers of the Joyner-Boore rupture
surfaces for the potential Class 2 earthquakes. The yellow rectangles are the surface projections of
the rupture planes. 16
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CLASS 1, 1F, 2: CRJB=10 KM
MAINSHOCK, FORESHOCK, AFTERSHOCK
Style 3<M<4 4<M<5 5<M<6 6<M< 7 M>7 TOTAL
1 5030 6443 1310 3097 1542 81%
1F 443 207 82 1 (Helena) 0 3%
2 369 526 1231 1230 0 16%
TOTAL 87% 33% 12% 20% 7%
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FINITE FAULT GEOMETRY: SIMULATION
NGA GMPE developers adopted a method (Chiou and
Youngs (2008) to simulate finite fault planes for events
without a finite fault model but with minimal information of
hypocenter, magnitude, and fault plane solution (or style of
faulting).
The goal of the simulation routine is to obtain an approximate
fault rupture geometry that may be used to compute distance
metrics and a few other path data (such as the source-site
angle, the fault rupture width W, and the depth to the top of
the rupture, ZTOR) that require knowledge of finite fault
geometry.
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SS: ZTOR (km)
ZTor M<5 5<M<6 6<M< 7 M>7
ALL 9570 1101 1140 785
0.0 18 5 60 419
0.01-2.5 545 35 785 363
2.51-5.0 1444 388 245 3
5.01-10.0 4898 369 5 0
10.01-20. 2578 304 45 0
>20.0 87 0 0 0
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NM: ZTOR (km)
ZTor M<5 5<M<6 6<M< 7 M>7
ALL 324 169 113 0
0.0 4 1 45 0
0.01-2.5 4 36 59 0
2.51-5.0 49 50 7 0
5.01-10.0 227 42 2 0
10.01-20.0 38 35 0 0
>20.0 2 5 0 0
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RV: ZTOR (km)
ZTor M<5 5<M<6 6<M< 7 M>7
ALL 1383 778 2847 74
0.0 49 3 43 43
0.01-2.5 0 20 448 18
2.51-5.0 95 20 1374 13(CM)
5.01-10.0 664 507 909 0
10.01-20.0 565 225 73 0
>20.0 11 3 0 0
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SS: Dip (deg)
DIP M<5 5<M<6 6<M< 7 M>7
ALL 9570 1101 1140 785
0 to 15 0 0 0 0
15 to 45 252 0 0 0
45 to 75 3457 312 49 387*
75 to 90 5861 789 1091 398
* El Mayor Cucapah, Duzce
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NM: DIP (deg)
DIP M<5 5<M<6 6<M< 7 M>7
ALL 324 169 113 0
0 to 30 0 0 0 0
30 to 45 57 7 9 0
45 to 60 95 114 82 0
60 to 75 132 48 22 0
75 to 90 40 0 0 0
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RV: DIP (deg)
DIP(º) M<5 5<M<6 6<M< 7 M>7
10 to 90 1383 778 2847 74
10 to 15 0 0 254 26
15 to 30 171 43 3 7
30 to 45 890 307 1549 0
45 to 60 315 427 678 37
60 to 75 0 0 328 0
75 to 90 7 (75º) 1 (GGP) 35 4Kern
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PEER NGA-West2 Database
Timothy D. Ancheta
Pacific Earthquake Engineering Research Center
Robert Darragh
Pacific Engineering and Analysis, Inc.
Jonathan P. Stewart
Emel Seyhan
University of California, Los Angeles
Walter Silva
Pacific Engineering and Analysis, Inc.
Brian Chiou
California Department of Transporation
Katie Wooddell
Pacific Gas & Electric, Inc.
Robert Graves
United States Geologic Survey
Albert Kottke
Pacific Earthquake Engineering Research Center
David M. Boore
United States Geologic Survey
Tadahiro Kishida
Pacific Earthquake Engineering Research Center
Jennifer L. Donahue
Geosyntec Consultants
PEER Report 2013/01
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HAZARD SENSITIVE
SOURCES
SWUS GMC SSHAC WORKSHOP #1
March 19-21, 2013
Oakland, California
Robert B. Darragh
Pacific Engineering & Analysis
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Site Characterization
Site Vs30 Kappa
(m/sec) (sec)
DCPP 1100-1210 0.042 (K_RESP_0)
SONGS 443
PVNGS 350
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PEER NGA-WEST2: DCPP
EQ NAME M R PGA
(km) (g)
Parkfield 6.0 78 0.009
San Simeon 6.5 38 0.040
Deer Canyon 3.4 4 0.025
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DCPP NGA-West2
M 6.25 to 7.35, Rrup <50 km
Total (N) 221
Vs30 > 900 m/sec 4 (PLOT)
Vs30 >608m/sec 21 (PLOT)
Ztor (km) 0 to 4
Hypo Depth (km) 5.5 to 17.9 (Kobe)
Dip(deg) 63 (EMC) to 90
Class 1
Style of Faulting SS
HW/FW 15/3 (PLOT)
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6.30
6.40
6.50
6.60
6.70
6.80
6.90
7.00
7.10
7.20
7.30
0.01 0.1 1 10
M
Rrup (km)
DCPP SS M6.25 to 7.35 Rrup < 50 km Vs30 > 900 m/sec Vs30 < 900 m/sec
Hosgri M7.1 @ 4.9 km Shoreline M6.5 @ 0.6 km
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6.25
6.35
6.45
6.55
6.65
6.75
6.85
6.95
7.05
7.15
7.25
7.35
0.01 0.1 1 10
M
Rrup (km)
DCPP SS M6.25 to 7.35 Rrup < 50 km Hanging Wall Other Hosgri M7.1 @ 4.9 km Shoreline M6.5 @ 0.6 km
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DCPP NGA-West2
M 6.05 to 7.05, Rrup <50 km
Total (N) 667
Vs30 (m/sec)> 900 10 (PLOT)
Vs30 (m/sec)>608 82 (PLOT)
Ztor (km) 0 to 13.1 (Wenchuan-03)
Hypo Depth (km) 4.6 to 18.2 (Gazli)
Dip(deg) 10 (Chi-Chi 3) to 70 (PLOT)
Class 1 and 2 (Wenchuan,
Chi-Chi aftershocks)
Style of Faulting RV; RV-Oblique
HW/FW 109/131 (PLOT)
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PVNGS NGA-West2
M > 7.5, Rrup 200 to 300 km Total (N) 55
Wenchuan 33
Denali 17
Kocaeli 5
Vs30 (m/sec): 350 + 25% 26 (PLOT)
Ztor (km) 0
Hypo Depth (km) 8.9 (Denali) to 18.2 (Kocaeli)
Dip(deg) 50 (Wenchuan) to 82 (Denali)
Class 1
Style of Faulting SS
HW/FW 0/0
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7.50
7.60
7.70
7.80
7.90
8.00
100
M
Rrup (km)
PVNGS SS M > 7.5 Rrup 200 to 300 km Vs30: 350 m/sec +-25% Vs30: Other M8 @ 275 km
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PVNGS NGA-West2
5 < M <6.5, Rrup 0 to 150 km
Total (N) 1141
Vs30 (m/sec): 350 + 25% 477(PLOT)
Ztor (km) 0 to 18.9
Hypo Depth (km) 2.3 to 25.2
Dip(deg) 48 to 90
Class 1, 2
Style of Faulting SS
HW/FW 17/4
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PVNGS NGA-West2
5 < M <6.5, Rrup 0 to 150 km
Total (N) 242
Vs30 (m/sec): 350 + 25% 108 (PLOT)
Ztor (km) 0 to 38
Hypo Depth (km) 3.3 to 41
Dip(deg) 30 to 70
Class 1, 2
Style of Faulting NM
HW/FW 20/25
42
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EQ Name M R PGA
(km) (g)
Borrego Mtn 6.6 129 0.046
San Fernando 6.6 125 0.016
44
PEER NGA-WEST 2: SONGS
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SONGS NGA-West2
M 6.25 to 7.75, Rrup < 25 km
Total (N) 134
Vs30 (m/sec): 443 + 25% 24(PLOT)
Ztor (km) 0 to 3.93
Hypo Depth (km) 5.5-17.9 (Kobe)
Dip(deg) 63 -90
Class 1
Style of Faulting SS
HW/FW 8/2
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6.25
6.50
6.75
7.00
7.25
7.50
7.75
0.1 1 10
M
Rrup (km)
SONGS SS M6.25 to 7.75 Rrup < 25 km Vs30: 443 m/sec +- 25% Vs30: Other SONGS M7 @ 12.5 km
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SONGS NGA-West2
M 6.25 to 7.75, Rrup <25 km Total (N) 144
Vs30 (m/sec): 443 + 25% 50(PLOT)
Ztor (km) 0 to 5 (Northridge)
Hypo Depth (km) 4.6 (Coalinga) -17.5 (NR)
Dip(deg) 12(Friuli) -58(Gazli)
Class 1
Class 2 (7, not shown)
Style of Faulting RV
HW/FW 25/51 (PLOT)
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6.25
6.50
6.75
7.00
7.25
7.50
7.75
1 10
M
Rrup (km)
SONGS RV M6.25 to 7.75 Rrup < 25 km Vs30: 443 m/sec +- 25% Vs30: Other SONGS M7 @ 12.5 km
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6.25
6.50
6.75
7.00
7.25
7.50
7.75
1 10
M
Rrup (km)
SONGS RV M6.25 to 7.75 Rrup < 25 km HW FW Other SONGS M7 @ 12.5 km
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REFERENCE Ancheta, Timothy D., Robert B. Darragh, Jonathan P.
Stewart, Emel Seyhan, Walter J. Silva, Brian Chiou,, Katie
Wooddell, Robert Graves, Albert Kottke, David M. Boore,
Tadahiro Kishida and Jennifer L. Donahue, (2013). PEER
NGA-West2 Database, PEER Report 2013/01, Pacific
Earthquake Engineering Research Center, University of
California, Berkeley, CA.
Chiou, B.S.J., and R.R. Youngs, (2008). NGA model for
average horizontal component of peak ground motion and
response spectra, PEER Report 2008/09, Pacific
Earthquake Engineering Research Center, University of
California, Berkeley, CA.
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ADDITIONAL REFERENCES IN
PEER NGAW-2 REPORT
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