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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 2:18:57 AM (PST) on Wednesday, December 5, 2018.
The magnitude 1.7 event occurred 2 km (1 miles) ENE (71 degrees) of Santa Rosa, CA.
The hypocentral depth is 8 km ( 5 miles).



Magnitude 1.7 - duration magnitude (Md)
Time Wednesday, December 5, 2018 at 2:18:57 AM (PST)
Wednesday, December 5, 2018 at 10:18:57 (UTC)
Distance from Santa Rosa, CA - 2 km (1 miles) ENE (71 degrees)
Roseland, CA - 5 km (3 miles) NE (46 degrees)
Larkfield-Wikiup, CA - 9 km (5 miles) SE (139 degrees)
Sebastopol, CA - 13 km (8 miles) ENE (64 degrees)
Rohnert Park, CA - 13 km (8 miles) N (6 degrees)
Coordinates 38 deg. 27.2 min. N (38.454N), 122 deg. 41.1 min. W (122.685W)
Depth 7.72 km (4.8 miles)
Quality Good
Location Quality Parameters Nst=23, Nph=24, Dmin=7.0 km, Rmss=0.17 sec, Erho=0.37 km, Erzz=0.96 km, Gp=48 degrees
Event ID# nc73119306
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