3.1 magnitude earthquake 4 km from San Ramon, California, United States
2025-12-20 03:57:56 UTC
UTC time:
Saturday, December 20, 2025 03:57 AM
Your time:
2025-12-20T03:57:56Z
Magnitude Type:
ml
USGS page:
M 3.1 - 4 km SE of San Ramon, CA
USGS status:
Reviewed by a seismologist
Reports from the public:
79 people
2025-12-20 03:57:56 UTC
3.1 magnitude, 4 km depth
San Ramon, California, United States
San Ramon, California, United States
3.1 magnitude earthquake
Today
2025-12-20 03:57:56 UTC
at 03:57
December 20, 2025 UTC
Location:
Epicenter at 37.75, -121.949
4.2 km from
San Ramon
(2.2 miles)
San Francisco Bay Area, California
Depth: 4 km