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 6:06:34 PM (PDT) on Tuesday, September 16, 2025.
The magnitude 1.3 event occurred 5 km (3 miles) SE of Ontario, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 1.3 - local magnitude (Ml) |
| Time | Tuesday, September 16, 2025 at 6:06:34 PM (PDT) Wednesday, September 17, 2025 at 1:06:34 (UTC) |
| Distance from |
Ontario, CA - 5 km (3 miles) SE (136 degrees) Mira Loma, CA - 8 km (5 miles) WNW (295 degrees) Chino, CA - 9 km (6 miles) E (83 degrees) Upland, CA - 10 km (6 miles) SSE (148 degrees) Glen Avon, CA - 10 km (6 miles) W (277 degrees) |
| Coordinates | 34 deg. 1.3 min. N (34.022N), 117 deg. 35.5 min. W (117.592W) |
| Depth | 5.28 km (3.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=54, Nph=86, Dmin=3.4 km, Rmss=0.19 sec, Erho=0.18 km, Erzz=0.38 km, Gp=49 degrees |
| Event ID# | ci41292608 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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