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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 9:45:33 PM (PST) on Tuesday, February 11, 2020.
The magnitude 1.1 event occurred 4 km (3 miles) SSW of Lytle Creek, CA.
The hypocentral depth is 9 km ( 6 miles).



Magnitude 1.1 - local magnitude (Ml)
Time Tuesday, February 11, 2020 at 9:45:33 PM (PST)
Wednesday, February 12, 2020 at 5:45:33 (UTC)
Distance from Lytle Creek, CA - 4 km (3 miles) SSW (196 degrees)
Devore, CA - 10 km (6 miles) W (271 degrees)
Rancho Cucamonga, CA - 13 km (8 miles) NNE (29 degrees)
Fontana, CA - 15 km (9 miles) NNW (341 degrees)
Muscoy, CA - 17 km (11 miles) WNW (297 degrees)
Coordinates 34 deg. 13.4 min. N (34.224N), 117 deg. 30.7 min. W (117.511W)
Depth 9.29 km (5.8 miles)
Quality Good
Location Quality Parameters Nst=28, Nph=39, Dmin=9.5 km, Rmss=0.17 sec, Erho=0.27 km, Erzz=0.49 km, Gp=44 degrees
Event ID# ci39299128
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