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 11:03:57 PM (PST) on Sunday, December 21, 2025.
The magnitude 1.6 event occurred 5 km (3 miles) SW of Ridgemark, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Sunday, December 21, 2025 at 11:03:57 PM (PST) Monday, December 22, 2025 at 7:03:57 (UTC) |
| Distance from |
Ridgemark, CA - 5 km (3 miles) SW (227 degrees) Hollister, CA - 7 km (5 miles) S (187 degrees) San Juan Bautista, CA - 14 km (8 miles) ESE (122 degrees) Prunedale, CA - 23 km (14 miles) E (89 degrees) Salinas, CA - 24 km (15 miles) ENE (63 degrees) |
| Coordinates | 36 deg. 46.9 min. N (36.781N), 121 deg. 24.5 min. W (121.408W) |
| Depth | 6.96 km (4.30 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=13, Nph=13, Dmin=4.0 km, Rmss=0.14 sec, Erho=0.53 km, Erzz=0.870000005 km, Gp=69 degrees |
| Event ID# | nc75284606 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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