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 7:29:45 AM (PDT) on Monday, September 15, 2025.
The magnitude 1.2 event occurred 6 km (4 miles) NNE (26 degrees) of Chester, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.2 - duration magnitude (Md) |
| Time | Monday, September 15, 2025 at 7:29:45 AM (PDT) Monday, September 15, 2025 at 14:29:45 (UTC) |
| Distance from |
Chester, CA - 6 km (4 miles) NNE (26 degrees) Greenville, CA - 32 km (20 miles) NW (318 degrees) Susanville, CA - 48 km (30 miles) W (261 degrees) Quincy, CA - 51 km (32 miles) NNW (335 degrees) Johnstonville, CA - 52 km (32 miles) W (266 degrees) |
| Coordinates | 40 deg. 21.1 min. N (40.352N), 121 deg. 12.2 min. W (121.203W) |
| Depth | 5.88 km (3.70 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=10, Nph=11, Dmin=10.6 km, Rmss=0.07 sec, Erho=0.53 km, Erzz=1.21 km, Gp=144 degrees |
| Event ID# | nc75238047 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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