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 12:07:30 PM (PST) on Thursday, November 20, 2025.
The magnitude 1.0 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 | 1.0 - local magnitude (Ml) |
| Time | Thursday, November 20, 2025 at 12:07:30 PM (PST) Thursday, November 20, 2025 at 20:07:30 (UTC) |
| Distance from |
Bonita, CA - 6 km (4 miles) ESE (115 degrees) Chula Vista, CA - 7 km (5 miles) E (84 degrees) La Presa, CA - 9 km (5 miles) SSE (163 degrees) San Ysidro, CA - 11 km (7 miles) NE (36 degrees) Tijuana, B.C., MX - 12 km (8 miles) NNE (22 degrees) |
| Coordinates | 32 deg. 38.1 min. N (32.634N), 116 deg. 58.2 min. W (116.971W) |
| Depth | -0.43 km (-0.30 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=17, Nph=23, Dmin=4.8 km, Rmss=0.23 sec, Erho=0.81 km, Erzz=31.61 km, Gp=210 degrees |
| Event ID# | ci41125039 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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