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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 4:32:28 AM (PST) on Wednesday, December 5, 2018.
The magnitude 2.5 event occurred 15 km (9 miles) NNE (33 degrees) of East Quincy, CA.
The hypocentral depth is 2 km ( 1 mile).



Magnitude 2.5 - duration magnitude (Md)
Time Wednesday, December 5, 2018 at 4:32:28 AM (PST)
Wednesday, December 5, 2018 at 12:32:28 (UTC)
Distance from East Quincy, CA - 15 km (9 miles) NNE (33 degrees)
Greenville, CA - 16 km (10 miles) SE (130 degrees)
Quincy, CA - 17 km (11 miles) NE (46 degrees)
Janesville, CA - 37 km (23 miles) SW (220 degrees)
Portola, CA - 39 km (24 miles) NW (312 degrees)
Coordinates 40 deg. 2.6 min. N (40.044N), 120 deg. 48.2 min. W (120.803W)
Depth 2.2 km (1.4 miles)
Quality Good
Location Quality Parameters Nst=31, Nph=33, Dmin=7.0 km, Rmss=0.13 sec, Erho=0.32 km, Erzz=0.58 km, Gp=84 degrees
Event ID# nc73119346
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