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 4:25:06 PM (PST) on Monday, December 22, 2025.
The magnitude 2.1 event occurred 5 km (3 miles) N of Dublin, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 2.1 - duration magnitude (Md) |
| Time | Monday, December 22, 2025 at 4:25:06 PM (PST) Tuesday, December 23, 2025 at 0:25:06 (UTC) |
| Distance from |
Dublin, CA - 5 km (3 miles) N (358 degrees) San Ramon, CA - 5 km (3 miles) SE (133 degrees) Blackhawk, CA - 8 km (5 miles) SSW (199 degrees) Diablo, CA - 10 km (6 miles) S (169 degrees) Danville, CA - 10 km (6 miles) SE (145 degrees) |
| Coordinates | 37 deg. 45.0 min. N (37.750N), 121 deg. 56.3 min. W (121.938W) |
| Depth | 8.22 km (5.10 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=22, Nph=22, Dmin=11.3 km, Rmss=0.06 sec, Erho=0.22 km, Erzz=0.540000021 km, Gp=45 degrees |
| Event ID# | nc75285006 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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