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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 1:29:50 AM (PDT) on Thursday, May 17, 2018.
The magnitude 1.0 event occurred 6 km (4 miles) SSW of Lytle Creek, CA.
The hypocentral depth is 5 km ( 3 miles).



Magnitude 1.0 - local magnitude (Ml)
Time Thursday, May 17, 2018 at 1:29:50 AM (PDT)
Thursday, May 17, 2018 at 8:29:50 (UTC)
Distance from Lytle Creek, CA - 6 km (4 miles) SSW (193 degrees)
Rancho Cucamonga, CA - 11 km (7 miles) NNE (33 degrees)
Devore, CA - 11 km (7 miles) W (260 degrees)
Fontana, CA - 13 km (8 miles) NNW (337 degrees)
Muscoy, CA - 17 km (10 miles) WNW (290 degrees)
Coordinates 34 deg. 12.3 min. N (34.205N), 117 deg. 30.9 min. W (117.514W)
Depth 4.79 km (3.0 miles)
Quality Good
Location Quality Parameters Nst=51, Nph=86, Dmin=1.3 km, Rmss=0.16 sec, Erho=0.14 km, Erzz=0.24 km, Gp=34 degrees
Event ID# ci38174784
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