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

A micro quarry occurred at 8:58:10 AM (PDT) on Wednesday, October 10, 2018.
The magnitude 1.5 event (a probable quarry explosion) occurred 4 km (2 miles) SE of Home Gardens, CA.
The hypocentral depth is -1 km (-0.3 miles).



Magnitude 1.5 - local magnitude (Ml)
Time Wednesday, October 10, 2018 at 8:58:10 AM (PDT)
Wednesday, October 10, 2018 at 15:58:10 (UTC)
Distance from Home Gardens, CA - 4 km (2 miles) SE (136 degrees)
Corona, CA - 7 km (5 miles) ESE (105 degrees)
Norco, CA - 10 km (6 miles) SSE (149 degrees)
Woodcrest, CA - 13 km (8 miles) WSW (255 degrees)
Pedley, CA - 14 km (9 miles) S (186 degrees)
Coordinates 33 deg. 51.2 min. N (33.853N), 117 deg. 29.5 min. W (117.492W)
Depth -0.53 km (-0.3 miles)
Quality Fair
Location Quality Parameters Nst=31, Nph=35, Dmin=5.9 km, Rmss=0.21 sec, Erho=0.32 km, Erzz=31.61 km, Gp=88 degrees
Event ID# ci38318984
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