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== PRELIMINARY EARTHQUAKE REPORT ==

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



Version #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 12:44:44 PM (PST) on Thursday, December 6, 2018.
The magnitude 1.5 event occurred 21 km (13 miles) SW of Patterson, CA.
The hypocentral depth is 2 km ( 2 miles).



Magnitude 1.5 - duration magnitude (Md)
Time Thursday, December 6, 2018 at 12:44:44 PM (PST)
Thursday, December 6, 2018 at 20:44:44 (UTC)
Distance from Patterson, CA - 21 km (13 miles) SW (224 degrees)
Newman, CA - 25 km (15 miles) W (275 degrees)
Gustine, CA - 28 km (17 miles) WNW (288 degrees)
Riverdale Park, CA - 38 km (23 miles) SW (215 degrees)
San Martin, CA - 39 km (24 miles) NE (45 degrees)
Coordinates 37 deg. 20.0 min. N (37.333N), 121 deg. 17.9 min. W (121.298W)
Depth 2.48 km (1.5 miles)
Quality Good
Location Quality Parameters Nst=18, Nph=20, Dmin=3.3 km, Rmss=0.1 sec, Erho=0.41 km, Erzz=0.57 km, Gp=158 degrees
Event ID# nc73119661
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