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 #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 9:38:00 AM (PDT) on Thursday, July 31, 2025.
The magnitude 1.2 event occurred 5 km (3 miles) NW of Rialto, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Thursday, July 31, 2025 at 9:38:00 AM (PDT) Thursday, July 31, 2025 at 16:38:00 (UTC) |
| Distance from |
Rialto, CA - 5 km (3 miles) NW (315 degrees) Fontana, CA - 6 km (4 miles) NE (45 degrees) Muscoy, CA - 6 km (4 miles) WSW (254 degrees) Bloomington, CA - 8 km (5 miles) N (351 degrees) Devore, CA - 9 km (6 miles) S (184 degrees) |
| Coordinates | 34 deg. 8.3 min. N (34.139N), 117 deg. 24.5 min. W (117.409W) |
| Depth | 5.72 km (3.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=28, Nph=40, Dmin=5.1 km, Rmss=0.16 sec, Erho=0.24 km, Erzz=0.58 km, Gp=49 degrees |
| Event ID# | ci41249520 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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