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 1:09:26 PM (PST) on Tuesday, December 23, 2025.
The magnitude 1.5 event occurred 23 km (14 miles) N (11 degrees) of Upper Lake, CA.
The hypocentral depth is 0.14 km (0.10 miles).
| Magnitude | 1.5 - duration magnitude (Md) |
| Time | Tuesday, December 23, 2025 at 1:09:26 PM (PST) Tuesday, December 23, 2025 at 21:09:26 (UTC) |
| Distance from |
Upper Lake, CA - 23 km (14 miles) N (11 degrees) Nice, CA - 27 km (17 miles) N (357 degrees) Redwood Valley, CA - 31 km (19 miles) ENE (69 degrees) North Lakeport, CA - 31 km (19 miles) N (7 degrees) Lakeport, CA - 36 km (22 miles) N (7 degrees) |
| Coordinates | 39 deg. 21.8 min. N (39.364N), 122 deg. 51.8 min. W (122.863W) |
| Depth | 0.14 km (0.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=9, Nph=9, Dmin=4.9 km, Rmss=0.19 sec, Erho=1.01 km, Erzz=17.7700005 km, Gp=93 degrees |
| Event ID# | nc75285416 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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