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 8:46:03 AM (PDT) on Thursday, July 31, 2025.
The magnitude 1.2 event occurred 6 km (4 miles) NE (36 degrees) of Fontana, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Thursday, July 31, 2025 at 8:46:03 AM (PDT) Thursday, July 31, 2025 at 15:46:03 (UTC) |
| Distance from |
Fontana, CA - 6 km (4 miles) NE (36 degrees) Rialto, CA - 6 km (4 miles) NW (313 degrees) Muscoy, CA - 7 km (4 miles) W (260 degrees) Bloomington, CA - 8 km (5 miles) NNW (346 degrees) Devore, CA - 9 km (5 miles) S (190 degrees) |
| Coordinates | 34 deg. 8.6 min. N (34.143N), 117 deg. 25.1 min. W (117.418W) |
| Depth | 4.89 km (3.00 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=59, Nph=92, Dmin=5.2 km, Rmss=0.21 sec, Erho=0.19 km, Erzz=0.41 km, Gp=23 degrees |
| Event ID# | ci41249440 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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