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 7:32:24 PM (PDT) on Friday, July 31, 2026.
The magnitude 1.3 event occurred 13 km (8 miles) NNW of Angwin, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.3 - duration magnitude (Md) |
| Time | Friday, July 31, 2026 at 7:32:24 PM (PDT) Saturday, August 1, 2026 at 2:32:24 (UTC) |
| Distance from |
Angwin, CA - 13 km (8 miles) NNW (341 degrees) Middletown, CA - 13 km (8 miles) SE (127 degrees) Calistoga, CA - 14 km (9 miles) NNE (32 degrees) Hidden Valley Lake, CA - 15 km (9 miles) SSE (159 degrees) Saint Helena, CA - 20 km (12 miles) N (354 degrees) |
| Coordinates | 38 deg. 41.0 min. N (38.683N), 122 deg. 29.8 min. W (122.496W) |
| Depth | 6.97 km (4.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=10, Nph=10, Dmin=8.2 km, Rmss=0.06 sec, Erho=0.41 km, Erzz=1.36000001 km, Gp=91 degrees |
| Event ID# | nc75409362 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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