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 event has been reviewed by a seismologist.
A micro earthquake occurred at 6:41:48 AM (PST) on Thursday, December 4, 2025.
The magnitude 0.5 event occurred 14 km (9 miles) S of Anza, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 0.5 - local magnitude (Ml) |
| Time | Thursday, December 4, 2025 at 6:41:48 AM (PST) Thursday, December 4, 2025 at 14:41:48 (UTC) |
| Distance from |
Anza, CA - 14 km (9 miles) S (173 degrees) Warner Springs, CA - 16 km (10 miles) N (353 degrees) Aguanga, CA - 20 km (12 miles) E (94 degrees) Palomar Observatory, CA - 21 km (13 miles) ENE (67 degrees) Lake Henshaw, CA - 23 km (14 miles) NNE (26 degrees) |
| Coordinates | 33 deg. 25.7 min. N (33.429N), 116 deg. 39.3 min. W (116.655W) |
| Depth | 4.71 km (2.90 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=22, Nph=40, Dmin=8.8 km, Rmss=0.13 sec, Erho=0.15 km, Erzz=0.36 km, Gp=56 degrees |
| Event ID# | ci41132423 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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