Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California
Version #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 3:20:21 PM (PST) on Friday, December 5, 2025.
The magnitude 1.2 event occurred 3 km (2 miles) N of Colton, CA.
The hypocentral depth is 15 km (10 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Friday, December 5, 2025 at 3:20:21 PM (PST) Friday, December 5, 2025 at 23:20:21 (UTC) |
| Distance from |
Colton, CA - 3 km (2 miles) N (352 degrees) San Bernardino, CA - 4 km (3 miles) SSW (213 degrees) Rialto, CA - 5 km (3 miles) E (101 degrees) Grand Terrace, CA - 7 km (4 miles) N (357 degrees) Muscoy, CA - 7 km (4 miles) SSE (159 degrees) |
| Coordinates | 34 deg. 5.9 min. N (34.098N), 117 deg. 19.1 min. W (117.318W) |
| Depth | 15.42 km (9.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=52, Nph=93, Dmin=12.8 km, Rmss=0.18 sec, Erho=0.17 km, Erzz=0.28 km, Gp=48 degrees |
| Event ID# | ci41133727 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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