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== PRELIMINARY EVENT REPORT ==

Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California



Version #7: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro quarry occurred at 2:02:19 PM (PDT) on Tuesday, October 9, 2018.
The magnitude 1.4 event (a probable quarry explosion) occurred 2 km (1 miles) SE of Home Gardens, CA.
The hypocentral depth is -1 km (-0.3 miles).



Magnitude 1.4 - local magnitude (Ml)
Time Tuesday, October 9, 2018 at 2:02:19 PM (PDT)
Tuesday, October 9, 2018 at 21:02:19 (UTC)
Distance from Home Gardens, CA - 2 km (1 miles) SE (140 degrees)
Corona, CA - 6 km (4 miles) E (98 degrees)
Norco, CA - 9 km (5 miles) SSE (152 degrees)
Pedley, CA - 13 km (8 miles) SSW (192 degrees)
Mira Loma, CA - 14 km (9 miles) S (176 degrees)
Coordinates 33 deg. 51.8 min. N (33.863N), 117 deg. 30.3 min. W (117.506W)
Depth -0.53 km (-0.3 miles)
Quality Fair
Location Quality Parameters Nst=29, Nph=32, Dmin=7.6 km, Rmss=0.27 sec, Erho=0.46 km, Erzz=31.61 km, Gp=52 degrees
Event ID# ci38318448
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