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 #4: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 1:35:07 PM (PDT) on Saturday, September 20, 2025.
The magnitude 1.4 event occurred 3 km (2 miles) NE (50 degrees) of Colton, CA.
The hypocentral depth is 14 km ( 9 miles).
| Magnitude | 1.4 - local magnitude (Ml) |
| Time | Saturday, September 20, 2025 at 1:35:07 PM (PDT) Saturday, September 20, 2025 at 20:35:07 (UTC) |
| Distance from |
Colton, CA - 3 km (2 miles) NE (50 degrees) San Bernardino, CA - 4 km (2 miles) S (169 degrees) Loma Linda, CA - 6 km (3 miles) NNW (337 degrees) Grand Terrace, CA - 7 km (4 miles) NNE (22 degrees) Rialto, CA - 8 km (5 miles) E (100 degrees) |
| Coordinates | 34 deg. 5.7 min. N (34.094N), 117 deg. 17.1 min. W (117.285W) |
| Depth | 14.29 km (8.90 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=75, Nph=134, Dmin=1.3 km, Rmss=0.18 sec, Erho=0.15 km, Erzz=0.29 km, Gp=28 degrees |
| Event ID# | ci40447154 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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