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 1:41:07 PM (PST) on Monday, December 22, 2025.
The magnitude 2.2 event occurred 5 km (3 miles) ESE of San Ramon, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 2.2 - duration magnitude (Md) |
| Time | Monday, December 22, 2025 at 1:41:07 PM (PST) Monday, December 22, 2025 at 21:41:07 (UTC) |
| Distance from |
San Ramon, CA - 5 km (3 miles) ESE (115 degrees) Dublin, CA - 7 km (4 miles) N (4 degrees) Blackhawk, CA - 7 km (4 miles) SSW (197 degrees) Diablo, CA - 8 km (5 miles) SSE (163 degrees) Danville, CA - 9 km (6 miles) SE (137 degrees) |
| Coordinates | 37 deg. 45.7 min. N (37.762N), 121 deg. 55.8 min. W (121.930W) |
| Depth | 7.07 km (4.40 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=19, Nph=19, Dmin=12.1 km, Rmss=0.07 sec, Erho=0.22 km, Erzz=0.610000014 km, Gp=85 degrees |
| Event ID# | nc75284951 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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