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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 4:15:22 PM (PST) on Thursday, December 6, 2018.
The magnitude 1.5 event occurred 17 km (10 miles) SSE of Ridgemark, CA.
The hypocentral depth is 4 km ( 3 miles).



Magnitude 1.5 - duration magnitude (Md)
Time Thursday, December 6, 2018 at 4:15:22 PM (PST)
Friday, December 7, 2018 at 0:15:22 (UTC)
Distance from Ridgemark, CA - 17 km (10 miles) SSE (161 degrees)
Hollister, CA - 21 km (13 miles) SSE (157 degrees)
Chualar, CA - 22 km (14 miles) ENE (59 degrees)
Gonzales, CA - 22 km (14 miles) NE (34 degrees)
Soledad, CA - 28 km (17 miles) N (4 degrees)
Coordinates 36 deg. 40.3 min. N (36.672N), 121 deg. 18.3 min. W (121.305W)
Depth 4.35 km (2.7 miles)
Quality Good
Location Quality Parameters Nst=23, Nph=28, Dmin=6.8 km, Rmss=0.1 sec, Erho=0.26 km, Erzz=1.15 km, Gp=88 degrees
Event ID# nc73119741
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