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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 1:35:58 PM (PDT) on Wednesday, October 10, 2018.
The magnitude 0.4 event occurred 6 km (4 miles) NW of The Geysers, CA.
The hypocentral depth is 4 km ( 2 miles).



Magnitude 0.4 - duration magnitude (Md)
Time Wednesday, October 10, 2018 at 1:35:58 PM (PDT)
Wednesday, October 10, 2018 at 20:35:58 (UTC)
Distance from The Geysers, CA - 6 km (4 miles) NW (323 degrees)
Cobb, CA - 6 km (4 miles) W (267 degrees)
Middletown, CA - 17 km (11 miles) WNW (295 degrees)
Kelseyville, CA - 18 km (11 miles) SSE (168 degrees)
Cloverdale, CA - 19 km (12 miles) E (86 degrees)
Coordinates 38 deg. 49.1 min. N (38.819N), 122 deg. 47.8 min. W (122.796W)
Depth 3.55 km (2.2 miles)
Quality Excellent
Location Quality Parameters Nst=18, Nph=19, Dmin=1.2 km, Rmss=0.03 sec, Erho=0.28 km, Erzz=0.56 km, Gp=41 degrees
Event ID# nc73095936
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