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 11:22:04 AM (PST) on Sunday, December 21, 2025.
The magnitude 2.1 event occurred 7 km (4 miles) NE (51 degrees) of Fremont, CA.
The hypocentral depth is 21 km (13 miles).
| Magnitude | 2.1 - duration magnitude (Md) |
| Time | Sunday, December 21, 2025 at 11:22:04 AM (PST) Sunday, December 21, 2025 at 19:22:04 (UTC) |
| Distance from |
Fremont, CA - 7 km (4 miles) NE (51 degrees) Union City, CA - 8 km (5 miles) ESE (102 degrees) Pleasanton, CA - 10 km (6 miles) SSW (206 degrees) Newark, CA - 12 km (7 miles) ENE (61 degrees) Dublin, CA - 14 km (8 miles) S (176 degrees) |
| Coordinates | 37 deg. 34.8 min. N (37.580N), 121 deg. 55.5 min. W (121.925W) |
| Depth | 21.27 km (13.20 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=9, Nph=6, Dmin=21.4 km, Rmss=0.23 sec, Erho=1.5 km, Erzz=2.3499999 km, Gp=190 degrees |
| Event ID# | nc75284216 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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