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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 1:28:48 AM (PST) on Wednesday, December 5, 2018.
The magnitude 1.2 event occurred 17 km (11 miles) SE of Livermore, CA.
The hypocentral depth is 3 km ( 2 miles).



Magnitude 1.2 - duration magnitude (Md)
Time Wednesday, December 5, 2018 at 1:28:48 AM (PST)
Wednesday, December 5, 2018 at 9:28:48 (UTC)
Distance from Livermore, CA - 17 km (11 miles) SE (145 degrees)
Pleasanton, CA - 23 km (14 miles) ESE (122 degrees)
East Foothills, CA - 24 km (15 miles) NE (37 degrees)
Milpitas, CA - 26 km (16 miles) ENE (58 degrees)
Alum Rock, CA - 26 km (16 miles) NE (36 degrees)
Coordinates 37 deg. 33.2 min. N (37.554N), 121 deg. 39.3 min. W (121.656W)
Depth 3.17 km (2.0 miles)
Quality Good
Location Quality Parameters Nst=20, Nph=23, Dmin=8.5 km, Rmss=0.07 sec, Erho=0.19 km, Erzz=0.87 km, Gp=63 degrees
Event ID# nc73119291
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