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 11:19:08 PM (PST) on Saturday, December 20, 2025.
The magnitude 1.8 event occurred 5 km (3 miles) N of Dublin, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 1.8 - duration magnitude (Md) |
| Time | Saturday, December 20, 2025 at 11:19:08 PM (PST) Sunday, December 21, 2025 at 7:19:08 (UTC) |
| Distance from |
Dublin, CA - 5 km (3 miles) N (349 degrees) San Ramon, CA - 5 km (3 miles) SE (143 degrees) Blackhawk, CA - 9 km (6 miles) SSW (202 degrees) Diablo, CA - 10 km (6 miles) S (174 degrees) Danville, CA - 10 km (6 miles) SSE (151 degrees) |
| Coordinates | 37 deg. 44.8 min. N (37.747N), 121 deg. 56.8 min. W (121.947W) |
| Depth | 8.26 km (5.10 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=16, Nph=16, Dmin=10.5 km, Rmss=0.09 sec, Erho=0.32 km, Erzz=0.660000026 km, Gp=63 degrees |
| Event ID# | nc75283876 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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