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== PRELIMINARY EARTHQUAKE REPORT ==

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



Version #3: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 5:30:48 PM (PDT) on Wednesday, May 1, 2013.
The magnitude 2.5 event occurred 4 km (3 miles) NNW of Punta Gorda, CA.
The hypocentral depth is 9 km ( 6 miles).



Magnitude 2.5 - duration magnitude (Md)
Time Wednesday, May 1, 2013 at 5:30:48 PM (PDT)
Thursday, May 2, 2013 at 0:30:48 (UTC)
Distance from Punta Gorda, CA - 4 km (3 miles) NNW (330 degrees)
Petrolia, CA - 9 km (6 miles) WSW (250 degrees)
Ferndale, CA - 33 km (20 miles) SSW (199 degrees)
Eureka, CA - 59 km (37 miles) SSW (199 degrees)
Coordinates 40 deg. 17.8 min. N (40.297N), 124 deg. 23.3 min. W (124.388W)
Depth 9.1 km (5.7 miles)
Quality Fair
Location Quality Parameters Nst= 27, Nph= 27, Dmin=9 km, Rmss=0.17 sec, Erho=0.7 km, Erzz=0.6 km, Gp=237.6 degrees
Event ID# nc71980445
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