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 10:54:45 AM (PDT) on Monday, August 18, 2025.
The magnitude 0.9 event (a probable quarry explosion) occurred 4 km (3 miles) SW of Winchester, CA.
The hypocentral depth is -1 km (-0.40 miles).
| Magnitude | 0.9 - local magnitude (Ml) |
| Time | Monday, August 18, 2025 at 10:54:45 AM (PDT) Monday, August 18, 2025 at 17:54:45 (UTC) |
| Distance from |
Winchester, CA - 4 km (3 miles) SW (227 degrees) Menifee, CA - 6 km (4 miles) SSE (155 degrees) Green Acres, CA - 8 km (5 miles) SSW (211 degrees) Murrieta Hot Springs, CA - 14 km (9 miles) NNE (15 degrees) Nuevo, CA - 14 km (9 miles) S (170 degrees) |
| Coordinates | 33 deg. 40.8 min. N (33.680N), 117 deg. 7.2 min. W (117.119W) |
| Depth | -0.63 km (-0.40 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=16, Nph=16, Dmin=7.1 km, Rmss=0.27 sec, Erho=0.64 km, Erzz=31.61 km, Gp=75 degrees |
| Event ID# | ci40402066 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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