== PRELIMINARY EARTHQUAKE REPORT ==

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

Version #5: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A minor earthquake occurred at 7:42:06 AM (PDT) on Friday, October 4, 2013.
The magnitude 3.9 event occurred 8 km (5 miles) SSW of Rio Dell, CA.
The hypocentral depth is 26 km (16 miles).

Magnitude		3.9 - moment magnitude (Mw)
Time		Friday, October 4, 2013 at 7:42:06 AM (PDT) Friday, October 4, 2013 at 14:42:06 (UTC)
Distance from		Rio Dell, CA - 8 km (5 miles) SSW (210 degrees) Hydesville, CA - 13 km (8 miles) SSW (201 degrees) Petrolia, CA - 17 km (10 miles) NE (42 degrees) Eureka, CA - 41 km (25 miles) S (179 degrees)
Coordinates		40 deg. 26.2 min. N (40.437N), 124 deg. 9.2 min. W (124.153W)
Depth		26.3 km (16.3 miles)
Quality		Good
Location Quality Parameters		Nst= 20, Nph= 20, Dmin=3 km, Rmss=0.1 sec, Erho=0.5 km, Erzz=1.1 km, Gp=111.6 degrees
Event ID#		nc72080926
Additional Information		map || waveforms
		Waveforms NCSS Moment Tensor Solution NCSS First Motion Mechanism 1

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

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