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 2:29:06 AM (PST) on Friday, November 21, 2025.
The magnitude 1.0 event occurred 8 km (5 miles) N (2 degrees) of Upland, CA.
The hypocentral depth is 11 km ( 7 miles).
| Magnitude | 1.0 - local magnitude (Ml) |
| Time | Friday, November 21, 2025 at 2:29:06 AM (PST) Friday, November 21, 2025 at 10:29:06 (UTC) |
| Distance from |
Upland, CA - 8 km (5 miles) N (2 degrees) Rancho Cucamonga, CA - 8 km (5 miles) NW (308 degrees) Claremont, CA - 10 km (6 miles) NE (41 degrees) Montclair, CA - 11 km (7 miles) NNE (22 degrees) La Verne, CA - 13 km (8 miles) ENE (57 degrees) |
| Coordinates | 34 deg. 10.0 min. N (34.167N), 117 deg. 38.8 min. W (117.646W) |
| Depth | 10.90 km (6.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=39, Nph=61, Dmin=5.2 km, Rmss=0.15 sec, Erho=0.22 km, Erzz=0.29 km, Gp=55 degrees |
| Event ID# | ci41125383 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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