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 12:52:18 PM (PDT) on Sunday, July 27, 2025.
The magnitude 0.9 event occurred 4 km (2 miles) SSE of San Ramon, CA.
The hypocentral depth is 9 km ( 5 miles).
| Magnitude | 0.9 - duration magnitude (Md) |
| Time | Sunday, July 27, 2025 at 12:52:18 PM (PDT) Sunday, July 27, 2025 at 19:52:18 (UTC) |
| Distance from |
San Ramon, CA - 4 km (2 miles) SSE (162 degrees) Dublin, CA - 6 km (4 miles) NNW (334 degrees) Danville, CA - 9 km (5 miles) SSE (159 degrees) Blackhawk, CA - 9 km (6 miles) SSW (212 degrees) Diablo, CA - 10 km (6 miles) S (184 degrees) |
| Coordinates | 37 deg. 44.9 min. N (37.749N), 121 deg. 57.9 min. W (121.965W) |
| Depth | 8.51 km (5.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=8, Nph=10, Dmin=8.9 km, Rmss=0.05 sec, Erho=0.3 km, Erzz=0.7 km, Gp=124 degrees |
| Event ID# | nc75215902 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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