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 8:10:32 AM (PST) on Saturday, December 20, 2025.
The magnitude 2.6 event occurred 5 km (3 miles) N of Dublin, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 2.6 - local magnitude (Ml) |
| Time | Saturday, December 20, 2025 at 8:10:32 AM (PST) Saturday, December 20, 2025 at 16:10:32 (UTC) |
| Distance from |
Dublin, CA - 5 km (3 miles) N (355 degrees) San Ramon, CA - 5 km (3 miles) SE (138 degrees) Blackhawk, CA - 9 km (5 miles) SSW (199 degrees) Diablo, CA - 10 km (6 miles) S (171 degrees) Danville, CA - 10 km (6 miles) SSE (148 degrees) |
| Coordinates | 37 deg. 44.8 min. N (37.747N), 121 deg. 56.4 min. W (121.941W) |
| Depth | 9.11 km (5.70 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=88, Nph=100, Dmin=10.1 km, Rmss=0.37 sec, Erho=1.02 km, Erzz=3.529 km, Gp=22 degrees |
| Event ID# | nc75283461 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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