Earthquake: 5.9 M OFFSHORE NORTHERN CALIFORNIA

Thursday, February 4, 2010

Earthquake: 5.9 M OFFSHORE NORTHERN CALIFORNIA

Now downgraded to a 5.95 M event == PRELIMINARY EARTHQUAKE REPORT ==
California Integrated Seismic Net
USGS/ Caltech/ CGS/ UCB/ UCSD/ UNR
Version #4: This report supersedes any earlier reports of this event.
This event has been reviewed by a seismologist.

A strong earthquake occurred at 12:20:21 PM (PST) on Thursday, February 4, 2010.
The magnitude 6.0 event occurred 56 km (35 miles) WNW of Petrolia, CA.
The hypocentral depth is 11 km ( 7 miles).

Magnitude	6.0 - regional moment magnitude (Mw)
Time	Thursday, February 4, 2010 at 12:20:21 PM (PST) Thursday, February 4, 2010 at 20:20:21 (UTC)
Distance from	Petrolia, CA - 56 km (35 miles) WNW (282 degrees) Ferndale, CA - 59 km (36 miles) WSW (254 degrees) Fortuna, CA - 68 km (43 miles) WSW (256 degrees) Eureka, CA - 76 km (47 miles) WSW (239 degrees) Sacramento, CA - 363 km (225 miles) NW (306 degrees)
Coordinates	40 deg. 25.8 min. N (40.431N), 124 deg. 55.8 min. W (124.929W)
Depth	11.2 km (7.0 miles)
Location Quality	Poor
Location Quality Parameters	Nst=101, Nph=101, Dmin=50 km, Rmss=0.35 sec, Erho=1.4 km, Erzz=2 km, Gp=226.8 degrees
Event ID#	nc71348851
Additional Information	map with fault names Google Earth KML (Requires Google Earth.) Did you feel it? ShakeMap shaking intensity maps NCSS First Motion Mechanism 1 NCSS First Motion Mechanism 2 Waveforms Waveforms for ShakeMap NCSS Moment Tensor Solution Tsunami Information Statement from the WC/ATWC

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Thursday, February 4, 2010