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== PRELIMINARY EARTHQUAKE REPORT ==

U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California



Version #0: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.

A micro earthquake occurred at 3:04:40 AM (PDT) on Friday, October 16, 2020.
The magnitude 1.5 event occurred 3 km (2 miles) SW of Angwin, CA.
The hypocentral depth is -0.3 km (-0.2 miles).



Magnitude 1.5 - duration magnitude (Md)
Time Friday, October 16, 2020 at 3:04:40 AM (PDT)
Friday, October 16, 2020 at 10:04:40 (UTC)
Distance from Angwin, CA - 3 km (2 miles) SW (224 degrees)
Saint Helena, CA - 6 km (4 miles) N (360 degrees)
Calistoga, CA - 10 km (6 miles) ESE (103 degrees)
Kenwood, CA - 17 km (11 miles) NNE (22 degrees)
Yountville, CA - 20 km (12 miles) NNW (331 degrees)
Coordinates 38 deg. 33.5 min. N (38.559N), 122 deg. 28.2 min. W (122.471W)
Depth -0.3 km (-0.2 miles)
Quality Good
Location Quality Parameters Nst=9, Nph=8, Dmin=10.0 km, Rmss=0.07 sec, Erho=0.4 km, Erzz=2.34 km, Gp=129 degrees
Event ID# nc73471416
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