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

Version #1: This report supersedes any earlier reports of this event.
This is a computer-generated message. This event has not yet been reviewed by a seismologist.

A microearthquake occurred at 12:51:35 AM (PDT) on Saturday, May 9, 2009.
The magnitude 1.8 event occurred 2 km (1 miles) N of The Geysers, CA.
The hypocentral depth is 4 km ( 2 miles).


Magnitude 1.8 - duration magnitude (Md)
Time Saturday, May 9, 2009 at 12:51:35 AM (PDT)
Saturday, May 9, 2009 at 7:51:35 (UTC)
Distance from The Geysers, CA - 2 km (1 miles) N (5 degrees)
Cobb, CA - 7 km (5 miles) WSW (255 degrees)
Anderson Springs, CA - 11 km (7 miles) WNW (296 degrees)
Santa Rosa, CA - 42 km (26 miles) NNW (348 degrees)
Sacramento, CA - 120 km (74 miles) WNW (285 degrees)
Coordinates 38 deg. 49.1 min. N (38.818N), 122 deg. 48.3 min. W (122.805W)
Depth 3.5 km (2.2 miles)
Location Quality Excellent
Location Quality Parameters Nst= 34, Nph= 34, Dmin=1 km, Rmss=0.06 sec, Erho=0.2 km, Erzz=0.4 km, Gp=39.6 degrees
Event ID# nc51221263
Additional Information map with fault names
Google Earth KML (Requires Google Earth.)
Waveforms

Did you feel it? || Shake Map North
For more information, see http://quake.wr.usgs.gov/ || Contacts

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