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== PRELIMINARY EARTHQUAKE 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.

A micro earthquake occurred at 2:49:53 AM (PST) on Wednesday, December 5, 2018.
The magnitude 1.7 event occurred 6 km (3 miles) NNW of The Geysers, CA.
The hypocentral depth is 0.41 km (0.3 miles).



Magnitude 1.7 - duration magnitude (Md)
Time Wednesday, December 5, 2018 at 2:49:53 AM (PST)
Wednesday, December 5, 2018 at 10:49:53 (UTC)
Distance from The Geysers, CA - 6 km (3 miles) NNW (329 degrees)
Cobb, CA - 6 km (4 miles) W (268 degrees)
Middletown, CA - 17 km (10 miles) WNW (297 degrees)
Kelseyville, CA - 18 km (11 miles) SSE (166 degrees)
Lower Lake, CA - 18 km (11 miles) WSW (237 degrees)
Coordinates 38 deg. 49.2 min. N (38.821N), 122 deg. 47.4 min. W (122.789W)
Depth 0.41 km (0.3 miles)
Quality Excellent
Location Quality Parameters Nst=31, Nph=33, Dmin=1.1 km, Rmss=0.06 sec, Erho=0.15 km, Erzz=0.27 km, Gp=41 degrees
Event ID# nc73119321
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