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 11:15:59 AM (PDT) on Thursday, July 31, 2025.
The magnitude 1.1 event occurred 6 km (3 miles) NW of Rialto, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 1.1 - local magnitude (Ml) |
| Time | Thursday, July 31, 2025 at 11:15:59 AM (PDT) Thursday, July 31, 2025 at 18:15:59 (UTC) |
| Distance from |
Rialto, CA - 6 km (3 miles) NW (312 degrees) Fontana, CA - 6 km (4 miles) NE (40 degrees) Muscoy, CA - 7 km (4 miles) WSW (256 degrees) Bloomington, CA - 8 km (5 miles) NNW (347 degrees) Devore, CA - 9 km (6 miles) S (187 degrees) |
| Coordinates | 34 deg. 8.4 min. N (34.140N), 117 deg. 24.9 min. W (117.415W) |
| Depth | 5.45 km (3.40 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=48, Nph=71, Dmin=5.0 km, Rmss=0.21 sec, Erho=0.22 km, Erzz=0.63 km, Gp=50 degrees |
| Event ID# | ci41249680 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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