Today: 3.9 magnitude earthquake near San Ramon, California, United States
Yesterday: 4.0 magnitude earthquake near San Ramon, California, United States
3.9 magnitude earthquake 4 km from San Ramon, California, United States
2025-12-21 02:31:54 UTC
UTC time:
Sunday, December 21, 2025 02:31 AM
Your time:
2025-12-21T02:31:54Z
Magnitude Type:
mw
USGS page:
M 3.9 - 5 km SE of San Ramon, CA
USGS status:
Reviewed by a seismologist
Reports from the public:
1949 people
2025-12-21 02:31:54 UTC
3.9 magnitude, 9 km depth
San Ramon, California, United States
San Ramon, California, United States
3.9 magnitude earthquake
Today
2025-12-21 02:31:54 UTC
at 02:31
December 21, 2025 UTC
Location:
Epicenter at 37.75, -121.939
4.2 km from
San Ramon
(2.2 miles)
San Francisco Bay Area, California
Depth: 9 km