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 8:57:09 PM (PST) on Sunday, December 21, 2025.
The magnitude 1.7 event occurred 21 km (13 miles) SE of Livermore, CA.
The hypocentral depth is 2 km ( 1 mile).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Sunday, December 21, 2025 at 8:57:09 PM (PST) Monday, December 22, 2025 at 4:57:09 (UTC) |
| Distance from |
Livermore, CA - 21 km (13 miles) SE (141 degrees) East Foothills, CA - 24 km (15 miles) NE (46 degrees) Alum Rock, CA - 26 km (16 miles) NE (44 degrees) Pleasanton, CA - 27 km (17 miles) ESE (122 degrees) Milpitas, CA - 28 km (17 miles) ENE (65 degrees) |
| Coordinates | 37 deg. 32.0 min. N (37.534N), 121 deg. 37.1 min. W (121.619W) |
| Depth | 2.11 km (1.30 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=6, Nph=5, Dmin=45.4 km, Rmss=0.18 sec, Erho=1.64 km, Erzz=16.7299995 km, Gp=188 degrees |
| Event ID# | nc75284566 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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