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 5:53:41 PM (PST) on Sunday, December 21, 2025.
The magnitude 1.4 event occurred 5 km (3 miles) WSW of Ridgemark, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Sunday, December 21, 2025 at 5:53:41 PM (PST) Monday, December 22, 2025 at 1:53:41 (UTC) |
| Distance from |
Ridgemark, CA - 5 km (3 miles) WSW (241 degrees) Hollister, CA - 6 km (4 miles) SSW (193 degrees) San Juan Bautista, CA - 13 km (8 miles) ESE (119 degrees) Prunedale, CA - 23 km (14 miles) E (86 degrees) Aromas, CA - 23 km (14 miles) ESE (118 degrees) |
| Coordinates | 36 deg. 47.4 min. N (36.791N), 121 deg. 24.9 min. W (121.415W) |
| Depth | 5.68 km (3.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=6, Nph=6, Dmin=4.1 km, Rmss=0.05 sec, Erho=0.53 km, Erzz=0.949999988 km, Gp=174 degrees |
| Event ID# | nc75284491 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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