Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 5:52:52 AM (PDT) on Tuesday, August 12, 2025.
The magnitude 1.0 event occurred 2 km (1 miles) N of Blackhawk, CA.
The hypocentral depth is 4 km ( 2 miles).
| Magnitude | 1.0 - duration magnitude (Md) |
| Time | Tuesday, August 12, 2025 at 5:52:52 AM (PDT) Tuesday, August 12, 2025 at 12:52:52 (UTC) |
| Distance from |
Blackhawk, CA - 2 km (1 miles) N (349 degrees) Diablo, CA - 4 km (3 miles) E (86 degrees) Danville, CA - 8 km (5 miles) ENE (77 degrees) San Ramon, CA - 9 km (5 miles) NE (42 degrees) Alamo, CA - 11 km (7 miles) E (98 degrees) |
| Coordinates | 37 deg. 50.2 min. N (37.837N), 121 deg. 54.7 min. W (121.912W) |
| Depth | 3.67 km (2.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=14, Nph=16, Dmin=5.9 km, Rmss=0.10 sec, Erho=0.21 km, Erzz=0.63 km, Gp=74 degrees |
| Event ID# | nc75222257 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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