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 2:22:39 PM (PDT) on Thursday, July 31, 2025.
The magnitude 1.5 event (a probable quarry explosion) occurred 44 km (27 miles) NE (53 degrees) of Holtville, CA.
The hypocentral depth is -0.20 km (-0.10 miles).
| Magnitude | 1.5 - local magnitude (Ml) |
| Time | Thursday, July 31, 2025 at 2:22:39 PM (PDT) Thursday, July 31, 2025 at 21:22:39 (UTC) |
| Distance from |
Holtville, CA - 44 km (27 miles) NE (53 degrees) Los Algodones, B.C., MX - 46 km (29 miles) NNW (327 degrees) Calipatria, CA - 48 km (30 miles) E (100 degrees) Brawley, CA - 50 km (31 miles) E (81 degrees) Yuma, AZ - 51 km (31 miles) NW (316 degrees) |
| Coordinates | 33 deg. 3.0 min. N (33.050N), 115 deg. 0.2 min. W (115.003W) |
| Depth | -0.20 km (-0.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=12, Nph=12, Dmin=9.0 km, Rmss=0.27 sec, Erho=0.67 km, Erzz=31.61 km, Gp=79 degrees |
| Event ID# | ci41249928 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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