Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #0: 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 0:44:31 AM (PDT) on Tuesday, October 28, 2025.
The magnitude 1.0 event occurred 5 km (3 miles) SSE of Concord, CA.
The hypocentral depth is 11 km ( 7 miles).
| Magnitude | 1.0 - duration magnitude (Md) |
| Time | Tuesday, October 28, 2025 at 0:44:31 AM (PDT) Tuesday, October 28, 2025 at 7:44:31 (UTC) |
| Distance from |
Concord, CA - 5 km (3 miles) SSE (153 degrees) Clayton, CA - 5 km (3 miles) WSW (258 degrees) Waldon, CA - 6 km (3 miles) E (84 degrees) Pleasant Hill, CA - 6 km (4 miles) ESE (107 degrees) Walnut Creek, CA - 7 km (4 miles) ENE (66 degrees) |
| Coordinates | 37 deg. 55.9 min. N (37.931N), 121 deg. 59.5 min. W (121.992W) |
| Depth | 10.92 km (6.80 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=7, Nph=7, Dmin=7.7 km, Rmss=0.04 sec, Erho=0.68 km, Erzz=1.38999999 km, Gp=200 degrees |
| Event ID# | nc75255591 |
| 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)
