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 #5: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro quarry occurred at 11:38:05 AM (PDT) on Monday, September 8, 2025.
The magnitude 1.1 event (a probable quarry explosion) occurred 7 km (4 miles) ESE of Chula Vista, CA.
The hypocentral depth is 3 km ( 2 miles).
| Magnitude | 1.1 - local magnitude (Ml) |
| Time | Monday, September 8, 2025 at 11:38:05 AM (PDT) Monday, September 8, 2025 at 18:38:05 (UTC) |
| Distance from |
Chula Vista, CA - 7 km (4 miles) ESE (108 degrees) Bonita, CA - 7 km (4 miles) SE (139 degrees) San Ysidro, CA - 9 km (5 miles) NE (42 degrees) Tijuana, B.C., MX - 10 km (6 miles) NNE (23 degrees) La Presa, CA - 11 km (7 miles) S (172 degrees) |
| Coordinates | 32 deg. 36.6 min. N (32.610N), 116 deg. 58.8 min. W (116.980W) |
| Depth | 2.77 km (1.70 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=25, Nph=37, Dmin=4.7 km, Rmss=0.15 sec, Erho=0.32 km, Erzz=0.33 km, Gp=106 degrees |
| Event ID# | ci41286408 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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