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 is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 12:50:20 PM (PDT) on Wednesday, October 22, 2025.
The magnitude 1.0 event occurred 3 km (2 miles) NNW of Fontana, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.0 - local magnitude (Ml) |
| Time | Wednesday, October 22, 2025 at 12:50:20 PM (PDT) Wednesday, October 22, 2025 at 19:50:20 (UTC) |
| Distance from |
Fontana, CA - 3 km (2 miles) NNW (327 degrees) Bloomington, CA - 9 km (6 miles) NW (307 degrees) Rancho Cucamonga, CA - 10 km (6 miles) E (93 degrees) Rialto, CA - 10 km (6 miles) W (278 degrees) Glen Avon, CA - 12 km (7 miles) N (5 degrees) |
| Coordinates | 34 deg. 7.1 min. N (34.118N), 117 deg. 28.5 min. W (117.474W) |
| Depth | 6.14 km (3.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=28, Nph=48, Dmin=6.1 km, Rmss=0.17 sec, Erho=0.29 km, Erzz=0.5 km, Gp=59 degrees |
| Event ID# | ci41112903 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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