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== PRELIMINARY EARTHQUAKE REPORT ==

U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California



Version #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 12:31:10 PM (PDT) on Friday, May 3, 2013.
The magnitude 0.5 event occurred 4 km (3 miles) NNW of The Geysers, CA.
The hypocentral depth is 3 km ( 2 miles).



Magnitude 0.5 - duration magnitude (Md)
Time Friday, May 3, 2013 at 12:31:10 PM (PDT)
Friday, May 3, 2013 at 19:31:10 (UTC)
Distance from The Geysers, CA - 4 km (3 miles) NNW (334 degrees)
Kelseyville, CA - 16 km (10 miles) S (177 degrees)
Cloverdale, CA - 17 km (10 miles) E (79 degrees)
Santa Rosa, CA - 45 km (28 miles) NNW (347 degrees)
Coordinates 38 deg. 50.0 min. N (38.834N), 122 deg. 49.7 min. W (122.829W)
Depth 2.6 km (1.6 miles)
Quality Excellent
Location Quality Parameters Nst= 26, Nph= 26, Dmin=1 km, Rmss=0.05 sec, Erho=0.2 km, Erzz=0.3 km, Gp=46.8 degrees
Event ID# nc71984926
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