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 #8: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 9:07:20 PM (PDT) on Thursday, July 31, 2025.
The magnitude 1.0 event occurred 7 km (4 miles) NNE (28 degrees) of Fontana, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.0 - local magnitude (Ml) |
| Time | Thursday, July 31, 2025 at 9:07:20 PM (PDT) Friday, August 1, 2025 at 4:07:20 (UTC) |
| Distance from |
Fontana, CA - 7 km (4 miles) NNE (28 degrees) Rialto, CA - 7 km (4 miles) NW (315 degrees) Muscoy, CA - 7 km (5 miles) W (268 degrees) Devore, CA - 8 km (5 miles) SSW (195 degrees) Bloomington, CA - 9 km (6 miles) NNW (344 degrees) |
| Coordinates | 34 deg. 9.1 min. N (34.151N), 117 deg. 25.5 min. W (117.424W) |
| Depth | 6.10 km (3.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=52, Nph=79, Dmin=4.6 km, Rmss=0.19 sec, Erho=0.21 km, Erzz=0.46 km, Gp=37 degrees |
| Event ID# | ci41250232 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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