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 0:42:29 AM (PST) on Monday, December 15, 2025.
The magnitude 2.0 event occurred 4 km (3 miles) ESE of San Ramon, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 2.0 - duration magnitude (Md) |
| Time | Monday, December 15, 2025 at 0:42:29 AM (PST) Monday, December 15, 2025 at 8:42:29 (UTC) |
| Distance from |
San Ramon, CA - 4 km (3 miles) ESE (119 degrees) Dublin, CA - 7 km (4 miles) N (0 degrees) Blackhawk, CA - 7 km (4 miles) SSW (200 degrees) Diablo, CA - 8 km (5 miles) SSE (166 degrees) Danville, CA - 9 km (5 miles) SE (140 degrees) |
| Coordinates | 37 deg. 45.7 min. N (37.761N), 121 deg. 56.1 min. W (121.935W) |
| Depth | 7.27 km (4.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=23, Nph=23, Dmin=11.7 km, Rmss=0.05 sec, Erho=0.17 km, Erzz=0.430000007 km, Gp=56 degrees |
| Event ID# | nc75280196 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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