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

A micro quarry occurred at 12:09:36 PM (PDT) on Wednesday, July 23, 2025.
The magnitude 1.1 event (a probable quarry explosion) occurred 4 km (2 miles) NW of Green Acres, CA.
The hypocentral depth is -1 km (-0.30 miles).


Magnitude 1.1 - local magnitude (Ml)
Time Wednesday, July 23, 2025 at 12:09:36 PM (PDT)
Wednesday, July 23, 2025 at 19:09:36 (UTC)
Distance from Green Acres, CA - 4 km (2 miles) NW (309 degrees)
Menifee, CA - 5 km (3 miles) NE (48 degrees)
Winchester, CA - 6 km (4 miles) NNW (340 degrees)
Nuevo, CA - 6 km (4 miles) SE (143 degrees)
Perris, CA - 12 km (7 miles) ESE (103 degrees)
Coordinates 33 deg. 45.5 min. N (33.758N), 117 deg. 6.4 min. W (117.107W)
Depth -0.52 km (-0.30 miles)
Quality Fair
Location Quality Parameters Nst=41, Nph=41, Dmin=5.2 km, Rmss=0.26 sec, Erho=0.41 km, Erzz=31.61 km, Gp=38 degrees
Event ID# ci41030183
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