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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 10:46:11 AM (PDT) on Friday, September 14, 2018.
The magnitude 1.0 event occurred 3 km (2 miles) NE (54 degrees) of San Dimas, CA.
The hypocentral depth is 6 km ( 3 miles).



Magnitude 1.0 - local magnitude (Ml)
Time Friday, September 14, 2018 at 10:46:11 AM (PDT)
Friday, September 14, 2018 at 17:46:11 (UTC)
Distance from San Dimas, CA - 3 km (2 miles) NE (54 degrees)
La Verne, CA - 3 km (2 miles) NNW (337 degrees)
Claremont, CA - 6 km (4 miles) WNW (298 degrees)
Charter Oak, CA - 7 km (4 miles) ENE (70 degrees)
Pomona, CA - 7 km (5 miles) NNW (343 degrees)
Coordinates 34 deg. 7.4 min. N (34.123N), 117 deg. 46.8 min. W (117.779W)
Depth 5.55 km (3.4 miles)
Quality Excellent
Location Quality Parameters Nst=21, Nph=27, Dmin=3.8 km, Rmss=0.1 sec, Erho=0.21 km, Erzz=0.44 km, Gp=77 degrees
Event ID# ci38060335
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