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 #8: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 9:28:57 PM (PST) on Friday, December 19, 2025.
The magnitude 1.5 event occurred 6 km (3 miles) NW of Rialto, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.5 - local magnitude (Ml) |
| Time | Friday, December 19, 2025 at 9:28:57 PM (PST) Saturday, December 20, 2025 at 5:28:57 (UTC) |
| Distance from |
Rialto, CA - 6 km (3 miles) NW (317 degrees) Muscoy, CA - 6 km (4 miles) W (259 degrees) Fontana, CA - 7 km (4 miles) NE (41 degrees) Bloomington, CA - 8 km (5 miles) N (350 degrees) Devore, CA - 9 km (5 miles) S (185 degrees) |
| Coordinates | 34 deg. 8.6 min. N (34.143N), 117 deg. 24.6 min. W (117.411W) |
| Depth | 7.10 km (4.40 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=87, Nph=149, Dmin=5.5 km, Rmss=0.18 sec, Erho=0.13 km, Erzz=0.28 km, Gp=28 degrees |
| Event ID# | ci41143487 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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