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 event has been reviewed by a seismologist.
A micro quarry occurred at 10:30:56 AM (PDT) on Tuesday, September 8, 2026.
The magnitude 1.1 event (a probable quarry explosion) occurred 6 km (4 miles) ESE of Chula Vista, CA.
The hypocentral depth is -0.43 km (-0.30 miles).
| Magnitude | 1.1 - local magnitude (Ml) |
| Time | Tuesday, September 8, 2026 at 10:30:56 AM (PDT) Tuesday, September 8, 2026 at 17:30:56 (UTC) |
| Distance from |
Chula Vista, CA - 6 km (4 miles) ESE (117 degrees) Bonita, CA - 7 km (4 miles) SSE (150 degrees) San Ysidro, CA - 8 km (5 miles) NE (39 degrees) Tijuana, B.C., MX - 9 km (5 miles) NNE (17 degrees) Imperial Beach, CA - 11 km (7 miles) ENE (78 degrees) |
| Coordinates | 32 deg. 36.3 min. N (32.605N), 116 deg. 59.6 min. W (116.993W) |
| Depth | -0.43 km (-0.30 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=28, Nph=36, Dmin=5.9 km, Rmss=0.27 sec, Erho=0.89 km, Erzz=31.61 km, Gp=205 degrees |
| Event ID# | ci41542880 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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