M1.7 earthquake 10km NE of Napa, CA

A magnitude 1.7 earthquake struck 10km NE of Napa, CA on Mon, Nov 15, 2021, 2:44 PM PST (22:44 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.9 1km NE of San Ramon, CA. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 163 in the 60 days after this one and 98 in the 30 days before it.

The first 60 of 163.

From the USGS Earthquake Hazards Program and its partner networks, event nc73653240. Read Sun, Oct 4, 2026, 9:17 AM UTC.