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 event has been reviewed by a seismologist.
A micro earthquake occurred at 6:36:34 PM (PST) on Saturday, December 20, 2025.
The magnitude 2.8 event occurred 5 km (3 miles) N of Dublin, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 2.8 - local magnitude (Ml) |
| Time | Saturday, December 20, 2025 at 6:36:34 PM (PST) Sunday, December 21, 2025 at 2:36:34 (UTC) |
| Distance from |
Dublin, CA - 5 km (3 miles) N (355 degrees) San Ramon, CA - 5 km (3 miles) SE (136 degrees) Blackhawk, CA - 8 km (5 miles) SSW (201 degrees) Diablo, CA - 9 km (6 miles) S (171 degrees) Danville, CA - 9 km (6 miles) SSE (147 degrees) |
| Coordinates | 37 deg. 45.0 min. N (37.750N), 121 deg. 56.5 min. W (121.941W) |
| Depth | 9.44 km (5.90 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=53, Nph=67, Dmin=10.2 km, Rmss=0.62 sec, Erho=1.26 km, Erzz=1.886 km, Gp=22 degrees |
| Event ID# | nc75283696 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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