Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 4:07:28 PM (PDT) on Monday, September 15, 2025.
The magnitude 1.9 event occurred 8 km (5 miles) ESE of Clayton, CA.
The hypocentral depth is 4 km ( 3 miles).
| Magnitude | 1.9 - duration magnitude (Md) |
| Time | Monday, September 15, 2025 at 4:07:28 PM (PDT) Monday, September 15, 2025 at 23:07:28 (UTC) |
| Distance from |
Clayton, CA - 8 km (5 miles) ESE (102 degrees) Antioch, CA - 9 km (6 miles) SSW (202 degrees) Brentwood, CA - 11 km (7 miles) W (270 degrees) Pittsburg, CA - 12 km (7 miles) SSE (163 degrees) Blackhawk, CA - 13 km (8 miles) NNE (25 degrees) |
| Coordinates | 37 deg. 55.6 min. N (37.926N), 121 deg. 50.8 min. W (121.847W) |
| Depth | 4.20 km (2.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=61, Nph=64, Dmin=5.6 km, Rmss=0.19 sec, Erho=0.16 km, Erzz=0.44 km, Gp=52 degrees |
| Event ID# | nc75238142 |
| 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)
