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 9:57:50 PM (PST) on Sunday, December 21, 2025.
The magnitude 1.4 event occurred 5 km (3 miles) SW of Ridgemark, CA.
The hypocentral depth is 4 km ( 2 miles).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Sunday, December 21, 2025 at 9:57:50 PM (PST) Monday, December 22, 2025 at 5:57:50 (UTC) |
| Distance from |
Ridgemark, CA - 5 km (3 miles) SW (228 degrees) Hollister, CA - 7 km (4 miles) S (184 degrees) San Juan Bautista, CA - 14 km (9 miles) ESE (119 degrees) Prunedale, CA - 24 km (15 miles) E (87 degrees) Salinas, CA - 24 km (15 miles) ENE (62 degrees) |
| Coordinates | 36 deg. 47.1 min. N (36.785N), 121 deg. 24.2 min. W (121.403W) |
| Depth | 4.02 km (2.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=7, Nph=7, Dmin=4.6 km, Rmss=0.03 sec, Erho=0.38 km, Erzz=1 km, Gp=102 degrees |
| Event ID# | nc75284581 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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