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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 6:25:33 PM (PST) on Thursday, December 6, 2018.
The magnitude 1.5 event occurred 11 km (7 miles) SSE of Ridgemark, CA.
The hypocentral depth is 15 km ( 9 miles).



Magnitude 1.5 - duration magnitude (Md)
Time Thursday, December 6, 2018 at 6:25:33 PM (PST)
Friday, December 7, 2018 at 2:25:33 (UTC)
Distance from Ridgemark, CA - 11 km (7 miles) SSE (163 degrees)
Hollister, CA - 16 km (10 miles) SSE (157 degrees)
Chualar, CA - 23 km (15 miles) NE (47 degrees)
San Juan Bautista, CA - 24 km (15 miles) SE (128 degrees)
Gonzales, CA - 25 km (16 miles) NNE (24 degrees)
Coordinates 36 deg. 42.8 min. N (36.714N), 121 deg. 19.6 min. W (121.327W)
Depth 14.89 km (9.3 miles)
Quality Excellent
Location Quality Parameters Nst=22, Nph=24, Dmin=11.5 km, Rmss=0.08 sec, Erho=0.29 km, Erzz=0.56 km, Gp=90 degrees
Event ID# nc73119791
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