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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 1:43:43 AM (PDT) on Saturday, May 4, 2013.
The magnitude 1.3 event occurred 1 km (1 miles) SW of Parkfield, CA.
The hypocentral depth is 11 km ( 7 miles).



Magnitude 1.3 - duration magnitude (Md)
Time Saturday, May 4, 2013 at 1:43:43 AM (PDT)
Saturday, May 4, 2013 at 8:43:43 (UTC)
Distance from Parkfield, CA - 1 km (1 miles) SW (214 degrees)
San Miguel, CA - 28 km (17 miles) NE (56 degrees)
Coalinga, CA - 29 km (18 miles) SSW (195 degrees)
Avenal, CA - 31 km (19 miles) WSW (246 degrees)
Coordinates 35 deg. 53.4 min. N (35.890N), 120 deg. 26.4 min. W (120.440W)
Depth 11.1 km (6.9 miles)
Quality Excellent
Location Quality Parameters Nst= 59, Nph= 59, Dmin=2 km, Rmss=0.07 sec, Erho=0.2 km, Erzz=0.2 km, Gp=46.8 degrees
Event ID# nc71985176
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NCSS First Motion Mechanism 1

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