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 #3: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 2:08:04 PM (PDT) on Thursday, September 4, 2025.
The magnitude 1.2 event (a probable quarry explosion) occurred 6 km (4 miles) ENE (57 degrees) of Rancho San Diego, CA.
The hypocentral depth is -0.43 km (-0.30 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Thursday, September 4, 2025 at 2:08:04 PM (PDT) Thursday, September 4, 2025 at 21:08:04 (UTC) |
| Distance from |
Rancho San Diego, CA - 6 km (4 miles) ENE (57 degrees) Bostonia, CA - 6 km (4 miles) ESE (122 degrees) Jamul, CA - 7 km (4 miles) N (357 degrees) El Cajon, CA - 8 km (5 miles) ESE (104 degrees) Winter Gardens, CA - 8 km (5 miles) SE (140 degrees) |
| Coordinates | 32 deg. 46.6 min. N (32.777N), 116 deg. 52.8 min. W (116.880W) |
| Depth | -0.43 km (-0.30 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=9, Nph=14, Dmin=7.5 km, Rmss=0.28 sec, Erho=0.52 km, Erzz=31.61 km, Gp=80 degrees |
| Event ID# | ci41283496 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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