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 minor earthquake occurred at 1:03:11 AM (PDT) on Wednesday, August 6, 2025.
The magnitude 3.2 event occurred 5 km (3 miles) SE of Ontario, CA.
The hypocentral depth is 4 km ( 2 miles).
| Magnitude | 3.2 - local magnitude (Ml) |
| Time | Wednesday, August 6, 2025 at 1:03:11 AM (PDT) Wednesday, August 6, 2025 at 8:03:11 (UTC) |
| Distance from |
Ontario, CA - 5 km (3 miles) SE (137 degrees) Mira Loma, CA - 8 km (5 miles) WNW (294 degrees) Chino, CA - 9 km (6 miles) E (85 degrees) Upland, CA - 10 km (6 miles) SSE (149 degrees) Glen Avon, CA - 10 km (6 miles) W (275 degrees) |
| Coordinates | 34 deg. 1.2 min. N (34.020N), 117 deg. 35.5 min. W (117.591W) |
| Depth | 4.01 km (2.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=106, Nph=159, Dmin=2.1 km, Rmss=0.23 sec, Erho=0.13 km, Erzz=0.32 km, Gp=21 degrees |
| Event ID# | ci41254392 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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