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 9:18:30 AM (PDT) on Wednesday, August 20, 2025.
The magnitude 1.3 event occurred 4 km (2 miles) SSW of Alamo, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 1.3 - duration magnitude (Md) |
| Time | Wednesday, August 20, 2025 at 9:18:30 AM (PDT) Wednesday, August 20, 2025 at 16:18:30 (UTC) |
| Distance from |
Alamo, CA - 4 km (2 miles) SSW (213 degrees) Danville, CA - 5 km (3 miles) W (270 degrees) Moraga, CA - 7 km (4 miles) ESE (103 degrees) Saranap, CA - 7 km (5 miles) SSE (166 degrees) San Ramon, CA - 8 km (5 miles) NW (304 degrees) |
| Coordinates | 37 deg. 49.3 min. N (37.822N), 122 deg. 3.3 min. W (122.055W) |
| Depth | 8.95 km (5.60 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=13, Nph=13, Dmin=0.9 km, Rmss=0.07 sec, Erho=0.32 km, Erzz=1.02999997 km, Gp=89 degrees |
| Event ID# | nc75226277 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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