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 9:50:59 PM (PDT) on Saturday, August 2, 2025.
The magnitude 1.2 event occurred 5 km (3 miles) NW of Rialto, CA.
The hypocentral depth is 4 km ( 3 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Saturday, August 2, 2025 at 9:50:59 PM (PDT) Sunday, August 3, 2025 at 4:50:59 (UTC) |
| Distance from |
Rialto, CA - 5 km (3 miles) NW (315 degrees) Fontana, CA - 6 km (4 miles) NE (50 degrees) Muscoy, CA - 6 km (4 miles) WSW (249 degrees) Bloomington, CA - 7 km (5 miles) N (353 degrees) Devore, CA - 10 km (6 miles) S (182 degrees) |
| Coordinates | 34 deg. 8.1 min. N (34.135N), 117 deg. 24.3 min. W (117.405W) |
| Depth | 4.43 km (2.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=66, Nph=111, Dmin=5.0 km, Rmss=0.18 sec, Erho=0.15 km, Erzz=0.32 km, Gp=45 degrees |
| Event ID# | ci41251864 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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