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 #3: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 11:44:18 PM (PST) on Thursday, December 11, 2025.
The magnitude 1.0 event occurred 2 km (1 miles) NW of Fontana, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.0 - local magnitude (Ml) |
| Time | Thursday, December 11, 2025 at 11:44:18 PM (PST) Friday, December 12, 2025 at 7:44:18 (UTC) |
| Distance from |
Fontana, CA - 2 km (1 miles) NW (324 degrees) Bloomington, CA - 8 km (5 miles) WNW (303 degrees) Rialto, CA - 9 km (6 miles) W (273 degrees) Rancho Cucamonga, CA - 10 km (6 miles) E (98 degrees) Glen Avon, CA - 11 km (7 miles) N (7 degrees) |
| Coordinates | 34 deg. 6.6 min. N (34.110N), 117 deg. 28.2 min. W (117.469W) |
| Depth | 6.22 km (3.90 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=61, Nph=105, Dmin=3.0 km, Rmss=0.16 sec, Erho=0.15 km, Erzz=0.32 km, Gp=43 degrees |
| Event ID# | ci41350184 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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