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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 4:07:19 AM (PST) on Wednesday, December 5, 2018.
The magnitude 1.8 event occurred 7 km (4 miles) NE (38 degrees) of East Quincy, CA.
The hypocentral depth is 4 km ( 2 miles).



Magnitude 1.8 - duration magnitude (Md)
Time Wednesday, December 5, 2018 at 4:07:19 AM (PST)
Wednesday, December 5, 2018 at 12:07:19 (UTC)
Distance from East Quincy, CA - 7 km (4 miles) NE (38 degrees)
Quincy, CA - 10 km (6 miles) ENE (58 degrees)
Greenville, CA - 19 km (12 miles) SSE (153 degrees)
Portola, CA - 38 km (23 miles) WNW (301 degrees)
Janesville, CA - 44 km (28 miles) SW (218 degrees)
Coordinates 39 deg. 59.0 min. N (39.984N), 120 deg. 50.8 min. W (120.847W)
Depth 3.84 km (2.4 miles)
Quality Fair
Location Quality Parameters Nst=9, Nph=10, Dmin=7.4 km, Rmss=0.09 sec, Erho=2.07 km, Erzz=1.01 km, Gp=319 degrees
Event ID# nc73119336
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