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 3:55:24 AM (PDT) on Wednesday, August 6, 2025.
The magnitude 0.8 event occurred 5 km (3 miles) SE of Ontario, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 0.8 - local magnitude (Ml) |
| Time | Wednesday, August 6, 2025 at 3:55:24 AM (PDT) Wednesday, August 6, 2025 at 10:55:24 (UTC) |
| Distance from |
Ontario, CA - 5 km (3 miles) SE (135 degrees) Mira Loma, CA - 7 km (5 miles) WNW (295 degrees) Chino, CA - 9 km (6 miles) E (84 degrees) Upland, CA - 10 km (6 miles) SSE (147 degrees) Glen Avon, CA - 10 km (6 miles) W (276 degrees) |
| Coordinates | 34 deg. 1.3 min. N (34.021N), 117 deg. 35.4 min. W (117.590W) |
| Depth | 5.39 km (3.30 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=37, Nph=59, Dmin=3.2 km, Rmss=0.13 sec, Erho=0.18 km, Erzz=0.3 km, Gp=62 degrees |
| Event ID# | ci41254560 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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