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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 8:52:27 PM (PST) on Wednesday, February 12, 2020.
The magnitude 0.6 event occurred 8 km (5 miles) SSW of Lytle Creek, CA.
The hypocentral depth is 7 km ( 4 miles).



Magnitude 0.6 - local magnitude (Ml)
Time Wednesday, February 12, 2020 at 8:52:27 PM (PST)
Thursday, February 13, 2020 at 4:52:27 (UTC)
Distance from Lytle Creek, CA - 8 km (5 miles) SSW (206 degrees)
Rancho Cucamonga, CA - 9 km (6 miles) NNE (26 degrees)
Fontana, CA - 13 km (8 miles) NNW (327 degrees)
Devore, CA - 13 km (8 miles) WSW (258 degrees)
Upland, CA - 15 km (9 miles) NE (43 degrees)
Coordinates 34 deg. 11.8 min. N (34.197N), 117 deg. 32.1 min. W (117.535W)
Depth 7.26 km (4.5 miles)
Quality Good
Location Quality Parameters Nst=21, Nph=37, Dmin=6.3 km, Rmss=0.14 sec, Erho=0.24 km, Erzz=0.56 km, Gp=106 degrees
Event ID# ci39070023
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