Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California
Version #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 1:04:07 PM (PDT) on Monday, October 27, 2025.
The magnitude 1.3 event (a probable quarry explosion) occurred 6 km (4 miles) ESE of Bonita, CA.
The hypocentral depth is -0.43 km (-0.30 miles).
| Magnitude | 1.3 - local magnitude (Ml) |
| Time | Monday, October 27, 2025 at 1:04:07 PM (PDT) Monday, October 27, 2025 at 20:04:07 (UTC) |
| Distance from |
Bonita, CA - 6 km (4 miles) ESE (113 degrees) Chula Vista, CA - 7 km (5 miles) E (83 degrees) La Presa, CA - 8 km (5 miles) SSE (162 degrees) San Ysidro, CA - 12 km (7 miles) NE (37 degrees) Spring Valley, CA - 12 km (8 miles) SSE (167 degrees) |
| Coordinates | 32 deg. 38.1 min. N (32.636N), 116 deg. 58.2 min. W (116.969W) |
| Depth | -0.43 km (-0.30 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=25, Nph=28, Dmin=4.8 km, Rmss=0.21 sec, Erho=0.69 km, Erzz=31.61 km, Gp=207 degrees |
| Event ID# | ci41321104 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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