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 2:58:48 AM (PST) on Tuesday, December 9, 2025.
The magnitude 1.6 event occurred 7 km (4 miles) S of Ridgemark, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Tuesday, December 9, 2025 at 2:58:48 AM (PST) Tuesday, December 9, 2025 at 10:58:48 (UTC) |
| Distance from |
Ridgemark, CA - 7 km (4 miles) S (171 degrees) Hollister, CA - 11 km (7 miles) SSE (159 degrees) San Juan Bautista, CA - 19 km (12 miles) ESE (122 degrees) Chualar, CA - 25 km (16 miles) NE (36 degrees) Salinas, CA - 27 km (17 miles) ENE (73 degrees) |
| Coordinates | 36 deg. 45.1 min. N (36.752N), 121 deg. 21.2 min. W (121.354W) |
| Depth | 7.59 km (4.70 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=15, Nph=15, Dmin=4.4 km, Rmss=0.24 sec, Erho=0.8 km, Erzz=1.40999997 km, Gp=77 degrees |
| Event ID# | nc75277286 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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