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 #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 1:29:07 PM (PDT) on Wednesday, August 5, 2026.
The magnitude 1.4 event (a probable quarry explosion) occurred 3 km (2 miles) ESE of Chula Vista, CA.
The hypocentral depth is -0.36 km (-0.20 miles).
| Magnitude | 1.4 - local magnitude (Ml) |
| Time | Wednesday, August 5, 2026 at 1:29:07 PM (PDT) Wednesday, August 5, 2026 at 20:29:07 (UTC) |
| Distance from |
Chula Vista, CA - 3 km (2 miles) ESE (121 degrees) Bonita, CA - 5 km (3 miles) SSE (167 degrees) San Ysidro, CA - 7 km (4 miles) NNE (20 degrees) Imperial Beach, CA - 9 km (6 miles) ENE (70 degrees) Tijuana, B.C., MX - 9 km (6 miles) N (1 degrees) |
| Coordinates | 32 deg. 36.7 min. N (32.612N), 117 deg. 1.1 min. W (117.018W) |
| Depth | -0.36 km (-0.20 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=21, Nph=23, Dmin=8.2 km, Rmss=0.3 sec, Erho=1.3 km, Erzz=31.61 km, Gp=210 degrees |
| Event ID# | ci40666818 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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