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 1:35:42 PM (PST) on Sunday, December 21, 2025.
The magnitude 1.8 event occurred 5 km (3 miles) SW of Ridgemark, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.8 - duration magnitude (Md) |
| Time | Sunday, December 21, 2025 at 1:35:42 PM (PST) Sunday, December 21, 2025 at 21:35:42 (UTC) |
| Distance from |
Ridgemark, CA - 5 km (3 miles) SW (229 degrees) Hollister, CA - 7 km (4 miles) S (186 degrees) San Juan Bautista, CA - 14 km (8 miles) ESE (120 degrees) Prunedale, CA - 23 km (15 miles) E (88 degrees) Salinas, CA - 24 km (15 miles) ENE (62 degrees) |
| Coordinates | 36 deg. 47.0 min. N (36.784N), 121 deg. 24.4 min. W (121.407W) |
| Depth | 6.29 km (3.90 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=15, Nph=15, Dmin=4.2 km, Rmss=0.08 sec, Erho=0.34 km, Erzz=0.629999995 km, Gp=70 degrees |
| Event ID# | nc75284351 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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