== 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 9:50:39 PM (PDT) on Wednesday, May 6, 2009.
The magnitude 1.0 event occurred 4 km (2 miles) SSW of Anderson Springs, CA.
The hypocentral depth is 1 km ( 1 mile).


Magnitude 1.0 - duration magnitude (Md)
Time Wednesday, May 6, 2009 at 9:50:39 PM (PDT)
Thursday, May 7, 2009 at 4:50:39 (UTC)
Distance from Anderson Springs, CA - 4 km (2 miles) SSW (209 degrees)
Middletown, CA - 8 km (5 miles) W (265 degrees)
Cobb, CA - 10 km (6 miles) S (175 degrees)
Santa Rosa, CA - 33 km (21 miles) N (359 degrees)
Sacramento, CA - 110 km (68 miles) W (281 degrees)
Coordinates 38 deg. 44.8 min. N (38.746N), 122 deg. 42.8 min. W (122.713W)
Depth 1.2 km (0.7 miles)
Location Quality Good
Location Quality Parameters Nst= 9, Nph= 9, Dmin=1 km, Rmss=0.05 sec, Erho=0.4 km, Erzz=0.7 km, Gp=115.2 degrees
Event ID# nc51221149
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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