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

A micro earthquake occurred at 8:29:29 PM (PDT) on Sunday, August 11, 2019.
The magnitude 1.0 event occurred 3 km (2 miles) N of Mira Loma, CA.
The hypocentral depth is 3 km ( 2 miles).



Magnitude 1.0 - local magnitude (Ml)
Time Sunday, August 11, 2019 at 8:29:29 PM (PDT)
Monday, August 12, 2019 at 3:29:29 (UTC)
Distance from Mira Loma, CA - 3 km (2 miles) N (359 degrees)
Glen Avon, CA - 3 km (2 miles) WNW (293 degrees)
Pedley, CA - 7 km (4 miles) NW (324 degrees)
Fontana, CA - 10 km (6 miles) SSW (213 degrees)
Ontario, CA - 11 km (7 miles) ESE (108 degrees)
Coordinates 34 deg. 1.4 min. N (34.023N), 117 deg. 31.0 min. W (117.517W)
Depth 2.68 km (1.7 miles)
Quality Good
Location Quality Parameters Nst=28, Nph=35, Dmin=4.6 km, Rmss=0.21 sec, Erho=0.28 km, Erzz=0.39 km, Gp=52 degrees
Event ID# ci38957680
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