ML090720103

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Additional Slides - Seismic Information
ML090720103
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 03/11/2009
From: Ketelsen S
Pacific Gas & Electric Co
To: Wang A
Plant Licensing Branch IV
Wang, A B, NRR/DORL/LPLIV, 415-1445
Shared Package
ML090720086 List:
References
TAC ME0174, TAC ME0175
Download: ML090720103 (12)


Text

J. Hardebeck (USGS)

Seismicity October 1987 to March 2007 DCPP Hosgri fault zone

Seismicity cross sections October 1987 to March 2007 J. Hardebeck (USGS)

J. Hardebeck (USGS)

Black: good quality single-event mechanisms Gray: lower quality single-event mechanisms Red: composite mechanisms Focal mechanisms show predominantly strike-slip motion in the offshore region DCPP Hosgri fault zone 1

N 15 E

Reprocessed gravity data for the region San Andreas Fault San Andreas Fault Hosgri Fault Hosgri Fault

Marine Data Marine Data Collection Collection

-June 2008

-35 ft R/V Parke Snavely

-Survey area = 900 km2

-Line Spacing (800/400 m)

-Rock samples Picture taken by: D. Scheirer Hosgri Fault Zone Cambria Fault CF Edna Fault Oceano Fault Olson Fault San Luis Bay Fault Wilmar Ave.

Fault Los Osos Fault Morro Bay Pt.

Buchon

Los Osos Fault Cambria Fault CF Edna Fault Oceano Fault Olson Fault San Luis Bay Fault Wilmar Ave.

Fault Hosgri Fault Zone

Comparison of Earthquake Locations with Marine Magnetic Data DCPP Janet Watt (USGS)

Hosgri fault zone

200 m

~ 20 m v.e ~ 3

200 m

~ 20 m v.e ~ 3

2 m multibeam bathymetry collected off Point Buchon DCPP

Initial Evaluation of Seismic Demands from Assumed Fault Magnitude Based on the size of the fault 24 km length (extended to the intersection with Hosgri) 12 km depth M = 6.5 Distance 1 km from DCPP (assumed)

Initial Evaluation of Ground Motion (84th Percentile Deterministic)