== 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 2:47:11 PM (PDT) on Monday, May 4, 2009.
The magnitude 0.9 event occurred 3 km (2 miles) W of Anderson Springs, CA.
The hypocentral depth is 2 km ( 1 mile).


Magnitude 0.9 - duration magnitude (Md)
Time Monday, May 4, 2009 at 2:47:11 PM (PDT)
Monday, May 4, 2009 at 21:47:11 (UTC)
Distance from Anderson Springs, CA - 3 km (2 miles) W (264 degrees)
Cobb, CA - 7 km (4 miles) S (184 degrees)
The Geysers, CA - 7 km (5 miles) ESE (113 degrees)
Santa Rosa, CA - 36 km (22 miles) N (357 degrees)
Sacramento, CA - 112 km (70 miles) WNW (283 degrees)
Coordinates 38 deg. 46.3 min. N (38.772N), 122 deg. 43.7 min. W (122.728W)
Depth 2.3 km (1.4 miles)
Location Quality Good
Location Quality Parameters Nst= 12, Nph= 12, Dmin=1 km, Rmss=0.05 sec, Erho=0.3 km, Erzz=0.5 km, Gp=100.8 degrees
Event ID# nc51221016
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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