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 8:26:47 AM (PDT) on Thursday, August 28, 2025.
The magnitude 0.4 event occurred 3 km (2 miles) NNW of Fontana, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 0.4 - local magnitude (Ml) |
| Time | Thursday, August 28, 2025 at 8:26:47 AM (PDT) Thursday, August 28, 2025 at 15:26:47 (UTC) |
| Distance from |
Fontana, CA - 3 km (2 miles) NNW (348 degrees) Bloomington, CA - 9 km (5 miles) NW (313 degrees) Rialto, CA - 9 km (6 miles) WNW (283 degrees) Rancho Cucamonga, CA - 11 km (7 miles) E (90 degrees) Muscoy, CA - 12 km (7 miles) WSW (253 degrees) |
| Coordinates | 34 deg. 7.4 min. N (34.124N), 117 deg. 27.9 min. W (117.465W) |
| Depth | 5.64 km (3.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=14, Nph=21, Dmin=6.9 km, Rmss=0.14 sec, Erho=0.36 km, Erzz=0.77 km, Gp=90 degrees |
| Event ID# | ci41277432 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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