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 7:45:24 AM (PDT) on Wednesday, August 13, 2025.
The magnitude 1.0 event occurred 6 km (4 miles) NE (35 degrees) of Fontana, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 1.0 - local magnitude (Ml) |
| Time | Wednesday, August 13, 2025 at 7:45:24 AM (PDT) Wednesday, August 13, 2025 at 14:45:24 (UTC) |
| Distance from |
Fontana, CA - 6 km (4 miles) NE (35 degrees) Rialto, CA - 6 km (4 miles) NW (311 degrees) Muscoy, CA - 7 km (4 miles) W (259 degrees) Bloomington, CA - 8 km (5 miles) NNW (344 degrees) Devore, CA - 9 km (6 miles) S (191 degrees) |
| Coordinates | 34 deg. 8.5 min. N (34.142N), 117 deg. 25.2 min. W (117.421W) |
| Depth | 5.39 km (3.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=36, Nph=56, Dmin=5.0 km, Rmss=0.15 sec, Erho=0.21 km, Erzz=0.58 km, Gp=69 degrees |
| Event ID# | ci41259984 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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