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 7:18:33 AM (PDT) on Sunday, August 31, 2025.
The magnitude 1.3 event occurred 13 km (8 miles) ESE of Middletown, CA.
The hypocentral depth is 3 km ( 2 miles).
| Magnitude | 1.3 - duration magnitude (Md) |
| Time | Sunday, August 31, 2025 at 7:18:33 AM (PDT) Sunday, August 31, 2025 at 14:18:33 (UTC) |
| Distance from |
Middletown, CA - 13 km (8 miles) ESE (123 degrees) Angwin, CA - 13 km (8 miles) NNW (345 degrees) Hidden Valley Lake, CA - 14 km (9 miles) SSE (156 degrees) Calistoga, CA - 15 km (9 miles) NNE (32 degrees) Saint Helena, CA - 21 km (13 miles) N (355 degrees) |
| Coordinates | 38 deg. 41.3 min. N (38.689N), 122 deg. 29.4 min. W (122.490W) |
| Depth | 2.83 km (1.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=8, Nph=8, Dmin=8.1 km, Rmss=0.15 sec, Erho=0.75 km, Erzz=4.30999994 km, Gp=122 degrees |
| Event ID# | nc75231242 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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