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

A micro quarry occurred at 12:01:14 PM (PDT) on Monday, September 29, 2025.
The magnitude 0.9 event (a probable quarry explosion) occurred 2 km (1 miles) SE of Home Gardens, CA.
The hypocentral depth is -0.44 km (-0.30 miles).


Magnitude 0.9 - local magnitude (Ml)
Time Monday, September 29, 2025 at 12:01:14 PM (PDT)
Monday, September 29, 2025 at 19:01:14 (UTC)
Distance from Home Gardens, CA - 2 km (1 miles) SE (132 degrees)
Corona, CA - 6 km (4 miles) E (95 degrees)
Norco, CA - 8 km (5 miles) SSE (150 degrees)
Pedley, CA - 13 km (8 miles) SSW (192 degrees)
Riverside, CA - 14 km (8 miles) SW (227 degrees)
Coordinates 33 deg. 51.9 min. N (33.865N), 117 deg. 30.2 min. W (117.503W)
Depth -0.44 km (-0.30 miles)
Quality Fair
Location Quality Parameters Nst=39, Nph=39, Dmin=5.5 km, Rmss=0.24 sec, Erho=0.43 km, Erzz=31.61 km, Gp=51 degrees
Event ID# ci41100719
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