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 #3: 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 12:22:28 PM (PST) on Thursday, December 4, 2025.
The magnitude 1.1 event occurred 11 km (7 miles) SW of Corona, CA.
The hypocentral depth is 7 km ( 5 miles).
| Magnitude | 1.1 - local magnitude (Ml) |
| Time | Thursday, December 4, 2025 at 12:22:28 PM (PST) Thursday, December 4, 2025 at 20:22:28 (UTC) |
| Distance from |
Corona, CA - 11 km (7 miles) SW (218 degrees) Foothill Ranch, CA - 12 km (7 miles) N (9 degrees) North Tustin, CA - 14 km (9 miles) ENE (77 degrees) Home Gardens, CA - 15 km (9 miles) SW (230 degrees) Villa Park, CA - 16 km (10 miles) E (99 degrees) |
| Coordinates | 33 deg. 47.6 min. N (33.793N), 117 deg. 38.5 min. W (117.641W) |
| Depth | 7.47 km (4.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=31, Nph=47, Dmin=3.0 km, Rmss=0.17 sec, Erho=0.24 km, Erzz=0.35 km, Gp=102 degrees |
| Event ID# | ci41132655 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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