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 #7: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 9:12:58 PM (PDT) on Thursday, July 31, 2025.
The magnitude 1.5 event occurred 7 km (4 miles) NNE (18 degrees) of Fontana, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.5 - local magnitude (Ml) |
| Time | Thursday, July 31, 2025 at 9:12:58 PM (PDT) Friday, August 1, 2025 at 4:12:58 (UTC) |
| Distance from |
Fontana, CA - 7 km (4 miles) NNE (18 degrees) Rialto, CA - 8 km (5 miles) NW (315 degrees) Devore, CA - 8 km (5 miles) SSW (203 degrees) Muscoy, CA - 8 km (5 miles) W (274 degrees) Bloomington, CA - 11 km (7 miles) NNW (341 degrees) |
| Coordinates | 34 deg. 9.6 min. N (34.160N), 117 deg. 26.0 min. W (117.433W) |
| Depth | 6.92 km (4.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=73, Nph=121, Dmin=3.7 km, Rmss=0.16 sec, Erho=0.13 km, Erzz=0.28 km, Gp=32 degrees |
| Event ID# | ci41250248 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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