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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 9:16:15 PM (PST) on Wednesday, December 5, 2018.
The magnitude 0.8 event occurred 15 km (9 miles) SSE of Ridgemark, CA.
The hypocentral depth is 7 km ( 4 miles).



Magnitude 0.8 - duration magnitude (Md)
Time Wednesday, December 5, 2018 at 9:16:15 PM (PST)
Thursday, December 6, 2018 at 5:16:15 (UTC)
Distance from Ridgemark, CA - 15 km (9 miles) SSE (168 degrees)
Hollister, CA - 20 km (12 miles) SSE (162 degrees)
Chualar, CA - 21 km (13 miles) NE (54 degrees)
Gonzales, CA - 22 km (14 miles) NNE (28 degrees)
San Juan Bautista, CA - 26 km (16 miles) SE (135 degrees)
Coordinates 36 deg. 40.8 min. N (36.681N), 121 deg. 19.8 min. W (121.329W)
Depth 7.2 km (4.5 miles)
Quality Good
Location Quality Parameters Nst=12, Nph=15, Dmin=7.8 km, Rmss=0.12 sec, Erho=0.68 km, Erzz=1.22 km, Gp=161 degrees
Event ID# nc73119476
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