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== 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 10:23:37 PM (PST) on Wednesday, January 7, 2009.
The magnitude 1.8 event occurred 3 km (2 miles) W of Anderson Springs, CA.
The hypocentral depth is 2 km ( 1 mile).


Magnitude 1.8 - duration magnitude (Md)
Time Wednesday, January 7, 2009 at 10:23:37 PM (PST)
Thursday, January 8, 2009 at 6:23:37 (UTC)
Distance from Anderson Springs, CA - 3 km (2 miles) W (270 degrees)
The Geysers, CA - 7 km (4 miles) ESE (111 degrees)
Cobb, CA - 7 km (4 miles) S (185 degrees)
Santa Rosa, CA - 36 km (23 miles) N (357 degrees)
Sacramento, CA - 112 km (70 miles) WNW (283 degrees)
Coordinates 38 deg. 46.5 min. N (38.775N), 122 deg. 43.8 min. W (122.730W)
Depth 1.5 km (0.9 miles)
Location Quality Excellent
Location Quality Parameters Nst= 27, Nph= 27, Dmin=1 km, Rmss=0.06 sec, Erho=0.2 km, Erzz=0.4 km, Gp=61.2 degrees
Event ID# nc51214859
Additional Information 2-degree map
Google Earth KML (Requires Google Earth.)
Waveforms

For more information, see http://quake.wr.usgs.gov/

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