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== 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 3:57:10 PM (PDT) on Thursday, October 11, 2018.
The magnitude 0.5 event occurred 10 km (7 miles) W of The Geysers, CA.
The hypocentral depth is 3 km ( 2 miles).



Magnitude 0.5 - duration magnitude (Md)
Time Thursday, October 11, 2018 at 3:57:10 PM (PDT)
Thursday, October 11, 2018 at 22:57:10 (UTC)
Distance from The Geysers, CA - 10 km (7 miles) W (261 degrees)
Cloverdale, CA - 13 km (8 miles) ESE (111 degrees)
Cobb, CA - 15 km (9 miles) WSW (243 degrees)
Healdsburg, CA - 17 km (11 miles) N (358 degrees)
Middletown, CA - 23 km (14 miles) W (273 degrees)
Coordinates 38 deg. 45.8 min. N (38.763N), 122 deg. 52.5 min. W (122.876W)
Depth 2.73 km (1.7 miles)
Quality Fair
Location Quality Parameters Nst=20, Nph=24, Dmin=2.7 km, Rmss=0.03 sec, Erho=0.23 km, Erzz=0.39 km, Gp=208 degrees
Event ID# nc73096201
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