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 #7: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 12:47:15 PM (PDT) on Thursday, August 7, 2025.
The magnitude 1.4 event occurred 5 km (3 miles) SE of Ontario, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 1.4 - local magnitude (Ml) |
| Time | Thursday, August 7, 2025 at 12:47:15 PM (PDT) Thursday, August 7, 2025 at 19:47:15 (UTC) |
| Distance from |
Ontario, CA - 5 km (3 miles) SE (136 degrees) Mira Loma, CA - 7 km (5 miles) WNW (294 degrees) Chino, CA - 9 km (6 miles) E (84 degrees) Upland, CA - 10 km (6 miles) SSE (148 degrees) Glen Avon, CA - 10 km (6 miles) W (276 degrees) |
| Coordinates | 34 deg. 1.2 min. N (34.020N), 117 deg. 35.4 min. W (117.591W) |
| Depth | 4.91 km (3.10 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=41, Nph=69, Dmin=2.1 km, Rmss=0.14 sec, Erho=0.17 km, Erzz=0.27 km, Gp=39 degrees |
| Event ID# | ci41255728 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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