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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 9:10:09 AM (PDT) on Thursday, July 12, 2018.
The magnitude 1.7 event (a probable quarry explosion) occurred 4 km (3 miles) SE of Home Gardens, CA.
The hypocentral depth is -1 km (-0.3 miles).



Magnitude 1.7 - local magnitude (Ml)
Time Thursday, July 12, 2018 at 9:10:09 AM (PDT)
Thursday, July 12, 2018 at 16:10:09 (UTC)
Distance from Home Gardens, CA - 4 km (3 miles) SE (137 degrees)
Corona, CA - 7 km (5 miles) ESE (106 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. 51.1 min. N (33.852N), 117 deg. 29.5 min. W (117.491W)
Depth -0.53 km (-0.3 miles)
Quality Fair
Location Quality Parameters Nst=46, Nph=50, Dmin=5.7 km, Rmss=0.21 sec, Erho=0.33 km, Erzz=31.61 km, Gp=72 degrees
Event ID# ci38219768
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