Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #3: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 9:52:44 AM (PDT) on Wednesday, August 20, 2025.
The magnitude 1.4 event occurred 4 km (3 miles) NNW of Lafayette, CA.
The hypocentral depth is 10 km ( 6 miles).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Wednesday, August 20, 2025 at 9:52:44 AM (PDT) Wednesday, August 20, 2025 at 16:52:44 (UTC) |
| Distance from |
Lafayette, CA - 4 km (3 miles) NNW (340 degrees) Orinda, CA - 6 km (4 miles) NE (40 degrees) Saranap, CA - 6 km (4 miles) NW (308 degrees) Walnut Creek, CA - 6 km (4 miles) WNW (285 degrees) Waldon, CA - 7 km (4 miles) W (265 degrees) |
| Coordinates | 37 deg. 55.2 min. N (37.920N), 122 deg. 8.0 min. W (122.134W) |
| Depth | 9.62 km (6.00 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=50, Nph=65, Dmin=1.7 km, Rmss=0.10 sec, Erho=0.15 km, Erzz=0.24 km, Gp=44 degrees |
| Event ID# | nc75226287 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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