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09/28/2004 M5 Aftershock

== PRELIMINARY EARTHQUAKE REPORT ==
California Integrated Seismic Net
USGS/ Caltech/ CGS/ UCB/ UCSD/ UNR

Version #3: This report supersedes any earlier reports of this event.
This event has been reviewed by a seismologist.

A moderate earthquake occurred at 10:10:04 AM (PDT) on Wednesday, September 29, 2004.
The magnitude 5.0 event occurred 9 km (5 miles) NW of Parkfield, CA.
The hypocentral depth is 12 km ( 7 miles).


Magnitude 5.0 - regional moment magnitude (Mw)
Time Wednesday, September 29, 2004 at 10:10:04 AM (PDT)
Wednesday, September 29, 2004 at 17:10:04 (UTC)
Distance from Parkfield, CA - 9 km (5 miles) NW (313 degrees)
Coalinga, CA - 25 km (15 miles) SSW (212 degrees)
San Miguel, CA - 28 km (18 miles) NE (38 degrees)
Bradley, CA - 29 km (18 miles) ENE (70 degrees)
San Jose City Hall, CA - 198 km (123 miles) SE (141 degrees)
Coordinates 35 deg. 57.2 min. N (35.953N), 120 deg. 30.1 min. W (120.502W)
Depth 11.5 km (7.1 miles)
Location Quality Excellent
Location Quality Parameters Nst=250, Nph=250, Dmin=0 km, Rmss=0.08 sec, Erho=0.1 km, Erzz=0.2 km, Gp=32.4 degrees
Event ID# nc51148805
Additional Information map with fault names
Topo map centered at earthquake (This link takes you offsite).

09/28/2004 Parkfield Earthquake
CISN Earthquake Reports



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