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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 3:21:21 AM (PDT) on Wednesday, September 11, 2019.
The magnitude 1.4 event occurred 7 km (5 miles) SSW of Brentwood, CA.
The hypocentral depth is 20 km (12 miles).



Magnitude 1.4 - duration magnitude (Md)
Time Wednesday, September 11, 2019 at 3:21:21 AM (PDT)
Wednesday, September 11, 2019 at 10:21:21 (UTC)
Distance from Brentwood, CA - 7 km (5 miles) SSW (204 degrees)
Byron, CA - 11 km (7 miles) W (270 degrees)
Blackhawk, CA - 14 km (9 miles) ENE (68 degrees)
Knightsen, CA - 14 km (9 miles) SW (216 degrees)
Oakley, CA - 15 km (9 miles) SSW (196 degrees)
Coordinates 37 deg. 52.0 min. N (37.867N), 121 deg. 45.6 min. W (121.760W)
Depth 19.92 km (12.4 miles)
Quality Fair
Location Quality Parameters Nst=7, Nph=7, Dmin=0.0 km, Rmss=0.04 sec, Erho=0.96 km, Erzz=0.79 km, Gp=231 degrees
Event ID# nc73268995
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