Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE 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 earthquake occurred at 8:19:04 AM (PDT) on Thursday, October 1, 2026.
The magnitude 1.2 event occurred 4 km (2 miles) N (7 degrees) of Rancho Cucamonga, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Thursday, October 1, 2026 at 8:19:04 AM (PDT) Thursday, October 1, 2026 at 15:19:04 (UTC) |
| Distance from |
Rancho Cucamonga, CA - 4 km (2 miles) N (7 degrees) Upland, CA - 9 km (6 miles) NE (46 degrees) Ontario, CA - 13 km (8 miles) NNE (23 degrees) Lytle Creek, CA - 13 km (8 miles) SSW (211 degrees) Fontana, CA - 13 km (8 miles) WNW (301 degrees) |
| Coordinates | 34 deg. 9.4 min. N (34.157N), 117 deg. 34.5 min. W (117.575W) |
| Depth | 8.49 km (5.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=37, Nph=58, Dmin=4.9 km, Rmss=0.15 sec, Erho=0.18 km, Erzz=0.37 km, Gp=51 degrees |
| Event ID# | ci41341671 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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