Recent Earthquakes in California and Nevada


== 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 12:20:32 PM (PDT) on Friday, July 14, 2023.
The magnitude 1.0 event (a probable quarry explosion) occurred 2 km (1 miles) ESE of Home Gardens, CA.
The hypocentral depth is -1 km (-0.3 miles).


Magnitude 1.0 - local magnitude (Ml)
Time Friday, July 14, 2023 at 12:20:32 PM (PDT)
Friday, July 14, 2023 at 19:20:32 (UTC)
Distance from Home Gardens, CA - 2 km (1 miles) ESE (121 degrees)
Corona, CA - 6 km (4 miles) E (91 degrees)
Norco, CA - 8 km (5 miles) SSE (149 degrees)
Pedley, CA - 12 km (7 miles) SSW (192 degrees)
Riverside, CA - 13 km (8 miles) SW (229 degrees)
Coordinates 33 deg. 52.2 min. N (33.869N), 117 deg. 30.2 min. W (117.504W)
Depth -0.53 km (-0.3 miles)
Quality Fair
Location Quality Parameters Nst=30, Nph=30, Dmin=7.9 km, Rmss=0.22 sec, Erho=0.43 km, Erzz=31.61 km, Gp=56 degrees
Event ID# ci39613114
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