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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 10:57:41 PM (PST) on Tuesday, December 4, 2018.
The magnitude 1.9 event occurred 18 km (11 miles) SE of Livermore, CA.
The hypocentral depth is 3 km ( 2 miles).



Magnitude 1.9 - duration magnitude (Md)
Time Tuesday, December 4, 2018 at 10:57:41 PM (PST)
Wednesday, December 5, 2018 at 6:57:41 (UTC)
Distance from Livermore, CA - 18 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 (37.553N), 121 deg. 39.2 min. W (121.653W)
Depth 3.13 km (1.9 miles)
Quality Good
Location Quality Parameters Nst=50, Nph=55, Dmin=8.4 km, Rmss=0.13 sec, Erho=0.17 km, Erzz=0.72 km, Gp=54 degrees
Event ID# nc73119256
Additional Information map || waveforms
  

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