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 1:32:10 PM (PDT) on Friday, August 15, 2025.
The magnitude 0.5 event occurred 3 km (2 miles) WNW of Fontana, CA.
The hypocentral depth is 4 km ( 2 miles).
| Magnitude | 0.5 - local magnitude (Ml) |
| Time | Friday, August 15, 2025 at 1:32:10 PM (PDT) Friday, August 15, 2025 at 20:32:10 (UTC) |
| Distance from |
Fontana, CA - 3 km (2 miles) WNW (286 degrees) Rancho Cucamonga, CA - 9 km (5 miles) ESE (104 degrees) Bloomington, CA - 9 km (6 miles) WNW (295 degrees) Glen Avon, CA - 10 km (6 miles) N (359 degrees) Rialto, CA - 11 km (7 miles) W (269 degrees) |
| Coordinates | 34 deg. 6.3 min. N (34.105N), 117 deg. 29.2 min. W (117.487W) |
| Depth | 3.75 km (2.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=10, Nph=16, Dmin=5.3 km, Rmss=0.12 sec, Erho=0.39 km, Erzz=0.54 km, Gp=145 degrees |
| Event ID# | ci40399650 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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