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 #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 6:35:25 AM (PST) on Saturday, December 20, 2025.
The magnitude 0.6 event occurred 6 km (4 miles) SW of Lytle Creek, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 0.6 - local magnitude (Ml) |
| Time | Saturday, December 20, 2025 at 6:35:25 AM (PST) Saturday, December 20, 2025 at 14:35:25 (UTC) |
| Distance from |
Lytle Creek, CA - 6 km (4 miles) SW (215 degrees) Rancho Cucamonga, CA - 11 km (7 miles) NNE (21 degrees) Devore, CA - 12 km (8 miles) W (267 degrees) Fontana, CA - 15 km (9 miles) NNW (332 degrees) Upland, CA - 17 km (10 miles) NE (38 degrees) |
| Coordinates | 34 deg. 13.0 min. N (34.217N), 117 deg. 32.1 min. W (117.535W) |
| Depth | 9.12 km (5.70 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=18, Nph=27, Dmin=3.4 km, Rmss=0.12 sec, Erho=0.28 km, Erzz=0.44 km, Gp=70 degrees |
| Event ID# | ci41143783 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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