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 #3: 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 earthquake occurred at 3:04:52 PM (PDT) on Saturday, October 31, 2026.
The magnitude 1.1 event occurred 2 km (1 miles) SE of Rancho Cucamonga, CA.
The hypocentral depth is 12 km ( 7 miles).
| Magnitude | 1.1 - local magnitude (Ml) |
| Time | Saturday, October 31, 2026 at 3:04:52 PM (PDT) Saturday, October 31, 2026 at 22:04:52 (UTC) |
| Distance from |
Rancho Cucamonga, CA - 2 km (1 miles) SE (141 degrees) Upland, CA - 8 km (5 miles) E (81 degrees) Ontario, CA - 8 km (5 miles) NE (44 degrees) Fontana, CA - 10 km (6 miles) W (277 degrees) Montclair, CA - 12 km (7 miles) ENE (74 degrees) |
| Coordinates | 34 deg. 6.5 min. N (34.108N), 117 deg. 33.9 min. W (117.564W) |
| Depth | 11.84 km (7.40 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=59, Nph=103, Dmin=2.8 km, Rmss=0.17 sec, Erho=0.18 km, Erzz=0.37 km, Gp=49 degrees |
| Event ID# | ci41570560 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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