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 4:34:32 PM (PDT) on Tuesday, July 22, 2025.
The magnitude 2.1 event (a probable quarry explosion) occurred 5 km (3 miles) NNW of Boron, CA.
The hypocentral depth is -1 km (-0.50 miles).
| Magnitude | 2.1 - local magnitude (Ml) |
| Time | Tuesday, July 22, 2025 at 4:34:32 PM (PDT) Tuesday, July 22, 2025 at 23:34:32 (UTC) |
| Distance from |
Boron, CA - 5 km (3 miles) NNW (339 degrees) Edwards Air Force Base, CA - 28 km (18 miles) ENE (57 degrees) California City, CA - 30 km (19 miles) ESE (108 degrees) Johannesburg, CA - 37 km (23 miles) S (185 degrees) Mojave, CA - 46 km (29 miles) E (91 degrees) |
| Coordinates | 35 deg. 2.5 min. N (35.042N), 117 deg. 40.2 min. W (117.670W) |
| Depth | -0.79 km (-0.50 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=34, Nph=34, Dmin=12.2 km, Rmss=0.12 sec, Erho=0.33 km, Erzz=31.61 km, Gp=100 degrees |
| Event ID# | ci41029303 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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