Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #0: 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 5:22:22 AM (PST) on Tuesday, December 23, 2025.
The magnitude 0.4 event occurred 2 km (1 miles) W of Orinda, CA.
The hypocentral depth is 11 km ( 7 miles).
| Magnitude | 0.4 - duration magnitude (Md) |
| Time | Tuesday, December 23, 2025 at 5:22:22 AM (PST) Tuesday, December 23, 2025 at 13:22:22 (UTC) |
| Distance from |
Orinda, CA - 2 km (1 miles) W (275 degrees) Berkeley, CA - 6 km (4 miles) E (83 degrees) Piedmont, CA - 7 km (4 miles) NNE (23 degrees) Lafayette, CA - 7 km (5 miles) W (264 degrees) Albany, CA - 8 km (5 miles) E (96 degrees) |
| Coordinates | 37 deg. 52.7 min. N (37.879N), 122 deg. 12.1 min. W (122.202W) |
| Depth | 11.43 km (7.10 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=6, Nph=5, Dmin=3.6 km, Rmss=0.03 sec, Erho=2.8 km, Erzz=6.03000021 km, Gp=220 degrees |
| Event ID# | nc75285281 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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