Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #903264: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 9:34:36 PM (PDT) on Wednesday, August 27, 2025.
The magnitude 2.2 event occurred 22 km (14 miles) WSW of Portola, CA.
The hypocentral depth is -1 km (-1 miles).
| Magnitude | 2.2 - local magnitude (Ml) |
| Time | Wednesday, August 27, 2025 at 9:34:36 PM (PDT) Thursday, August 28, 2025 at 4:34:36 (UTC) |
| Distance from |
Portola, CA - 22 km (14 miles) WSW (256 degrees) East Quincy, CA - 24 km (15 miles) SE (142 degrees) Quincy, CA - 27 km (17 miles) SE (135 degrees) Greenville, CA - 46 km (29 miles) SSE (155 degrees) Challenge-Brownsville, CA - 57 km (35 miles) NE (54 degrees) |
| Coordinates | 39 deg. 45.8 min. N (39.763N), 120 deg. 43.3 min. W (120.722W) |
| Depth | -1.13 km (-0.70 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=16, Nph=22, Dmin=14.9 km, Rmss=0.22 sec, Erho=0.72 km, Erzz=11.3599997 km, Gp=178.26999999999998 degrees |
| Event ID# | nc75229692 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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