== 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 11:48:53 AM (PDT) on Tuesday, May 7, 2013.
The magnitude 1.5 event occurred 4 km (3 miles) WSW of Danville, CA.
The hypocentral depth is 9 km ( 6 miles).

Magnitude		1.5 - duration magnitude (Md)
Time		Tuesday, May 7, 2013 at 11:48:53 AM (PDT) Tuesday, May 7, 2013 at 18:48:53 (UTC)
Distance from		Danville, CA - 4 km (3 miles) WSW (244 degrees) Alamo, CA - 5 km (3 miles) S (190 degrees) San Ramon, CA - 6 km (4 miles) WNW (296 degrees) San Francisco City Hall, CA - 33 km (21 miles) E (84 degrees)
Coordinates		37 deg. 48.3 min. N (37.805N), 122 deg. 2.5 min. W (122.042W)
Depth		8.8 km (5.5 miles)
Quality		Excellent
Location Quality Parameters		Nst= 64, Nph= 64, Dmin=2 km, Rmss=0.1 sec, Erho=0.2 km, Erzz=0.3 km, Gp=43.2 degrees
Event ID#		nc71987361
Additional Information		map || waveforms
		Waveforms NCSS First Motion Mechanism 1

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

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