== PRELIMINARY EVENT REPORT ==

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

Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

An event occurred at 2:13:08 PM (PDT) on Wednesday, May 8, 2013.
The magnitude 1.7 event (a probable quarry explosion) occurred 1 km (0 miles) SSE of Quarry near Cupertino, CA .
The hypocentral depth is 0 km (0.0 miles).

Magnitude		1.7 - duration magnitude (Md)
Time		Wednesday, May 8, 2013 at 2:13:08 PM (PDT) Wednesday, May 8, 2013 at 21:13:08 (UTC)
Distance from		Quarry near Cupertino, CA (a probable quarry explosion) - 1 km (0 miles) SSE (162 degrees) Cupertino, CA - 6 km (4 miles) W (267 degrees) Los Altos, CA - 7 km (5 miles) S (171 degrees) Mountain View, CA - 8 km (5 miles) SSW (192 degrees)
Coordinates		37 deg. 19.2 min. N (37.320N), 122 deg. 6.0 min. W (122.100W)
Depth		0 km (0.0 miles)
Quality		Good
Location Quality Parameters		Nst= 43, Nph= 43, Dmin=2 km, Rmss=0.21 sec, Erho=0.2 km, Erzz=31.6 km, Gp=54 degrees
Event ID#		nc71988141
Additional Information		map || waveforms
		Did you feel it? Waveforms

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