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 #5: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 9:04:02 AM (PST) on Sunday, November 23, 2025.
The magnitude 1.2 event occurred 4 km (3 miles) SE of Ontario, CA.
The hypocentral depth is 3 km ( 2 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Sunday, November 23, 2025 at 9:04:02 AM (PST) Sunday, November 23, 2025 at 17:04:02 (UTC) |
| Distance from |
Ontario, CA - 4 km (3 miles) SE (138 degrees) Mira Loma, CA - 8 km (5 miles) WNW (295 degrees) Chino, CA - 9 km (5 miles) E (81 degrees) Upland, CA - 9 km (6 miles) SSE (150 degrees) Montclair, CA - 10 km (6 miles) SE (125 degrees) |
| Coordinates | 34 deg. 1.5 min. N (34.024N), 117 deg. 35.8 min. W (117.597W) |
| Depth | 3.19 km (2.00 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=43, Nph=68, Dmin=1.3 km, Rmss=0.17 sec, Erho=0.17 km, Erzz=0.2 km, Gp=53 degrees |
| Event ID# | ci41125895 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
[
Index map ||
Big earthquake list ||
All earthquake list ||
Glossary of terms ||
Top page
]
[
Did you feel it? ||
ShakeMaps
|| Relative2Me
]
[ Data Sources ]
Special maps
Long Valley || Los Angeles || San Francisco
Data Sources
US and World - USGS/NEIC = National Earthquake Information Center
Northern California - UCB = University of California, Berkeley
Southern California - Caltech = California Institute of Technology
Nevada - UNR = University of Nevada, Reno
Offshore = West Coast & Alaska Tsunami Warning Center
...all members of the Advanced National Seismic System (ANSS)
