Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT 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 quarry occurred at 11:35:48 AM (PDT) on Monday, September 8, 2025.
The magnitude 1.6 event (a probable quarry explosion) occurred 9 km (5 miles) NE (41 degrees) of Central Valley (historical), CA.
The hypocentral depth is -0.44 km (-0.30 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Monday, September 8, 2025 at 11:35:48 AM (PDT) Monday, September 8, 2025 at 18:35:48 (UTC) |
| Distance from |
Central Valley (historical), CA - 9 km (5 miles) NE (41 degrees) Shasta Lake, CA - 9 km (5 miles) NE (41 degrees) Bella Vista, CA - 12 km (8 miles) NNW (332 degrees) Redding, CA - 19 km (12 miles) NNE (17 degrees) Palo Cedro, CA - 20 km (13 miles) NNW (344 degrees) |
| Coordinates | 40 deg. 44.4 min. N (40.739N), 122 deg. 18.2 min. W (122.303W) |
| Depth | -0.44 km (-0.30 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=12, Nph=12, Dmin=14.7 km, Rmss=0.11 sec, Erho=0.35 km, Erzz=31.61 km, Gp=70 degrees |
| Event ID# | nc75235077 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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