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== PRELIMINARY EARTHQUAKE REPORT ==

Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California



Version #5: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 11:08:01 AM (PDT) on Thursday, July 12, 2018.
The magnitude 0.8 event occurred 6 km (4 miles) SE of Ontario, CA.
The hypocentral depth is 4 km ( 3 miles).



Magnitude 0.8 - local magnitude (Ml)
Time Thursday, July 12, 2018 at 11:08:01 AM (PDT)
Thursday, July 12, 2018 at 18:08:01 (UTC)
Distance from Ontario, CA - 6 km (4 miles) SE (135 degrees)
Mira Loma, CA - 6 km (4 miles) WNW (291 degrees)
Glen Avon, CA - 9 km (5 miles) W (270 degrees)
Norco, CA - 9 km (6 miles) NNW (343 degrees)
Chino, CA - 10 km (6 miles) E (90 degrees)
Coordinates 34 deg. 0.7 min. N (34.012N), 117 deg. 34.7 min. W (117.579W)
Depth 4.46 km (2.8 miles)
Quality Fair
Location Quality Parameters Nst=23, Nph=36, Dmin=11.6 km, Rmss=0.16 sec, Erho=0.3 km, Erzz=0.65 km, Gp=84 degrees
Event ID# ci38219928
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