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 2:28:01 PM (PDT) on Tuesday, October 21, 2025.
The magnitude 0.8 event occurred 2 km (1 miles) NW of Fontana, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 0.8 - local magnitude (Ml) |
| Time | Tuesday, October 21, 2025 at 2:28:01 PM (PDT) Tuesday, October 21, 2025 at 21:28:01 (UTC) |
| Distance from |
Fontana, CA - 2 km (1 miles) NW (325 degrees) Bloomington, CA - 9 km (5 miles) NW (305 degrees) Rialto, CA - 9 km (6 miles) W (276 degrees) Rancho Cucamonga, CA - 10 km (6 miles) E (95 degrees) Glen Avon, CA - 12 km (7 miles) N (5 degrees) |
| Coordinates | 34 deg. 6.9 min. N (34.115N), 117 deg. 28.4 min. W (117.473W) |
| Depth | 6.28 km (3.90 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=30, Nph=51, Dmin=6.2 km, Rmss=0.18 sec, Erho=0.27 km, Erzz=0.59 km, Gp=57 degrees |
| Event ID# | ci41112447 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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