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


Brian Chiou

California Department of Transporation

Katie Wooddell

Pacific Gas & Electric, Inc.

Robert Graves

United States Geologic Survey

Albert Kottke


David M. Boore


Tadahiro Kishida


Jennifer L. Donahue

Geosyntec Consultants

PEER Report 2013/01

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

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

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

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).

9

Histograms of measured and inferred Vs30 at the

recording station sites in both the 2006 and 2013

site databases. 10

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%

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.

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


Robert Darragh


Jonathan P. Stewart

Emel Seyhan

University of California, Los Angeles

Walter Silva


Brian Chiou

California Department of Transporation

Katie Wooddell

Pacific Gas & Electric, Inc.

Robert Graves


Albert Kottke


David M. Boore


Tadahiro Kishida


Jennifer L. Donahue

Geosyntec Consultants

PEER Report 2013/01

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)

29

30

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

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


HW/FW 0/0

38

39

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

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


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

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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

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PEER NGA-WEST 2: SONGS

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


HW/FW 8/2

45

46

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

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)

47

48

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

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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peer nga-west2 database nga-west2 database swus gmc sshac workshop #1 march 19-21, 2013 oakland, ......

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