M1.7 earthquake 7km W of Cobb, CA

A magnitude 1.7 earthquake struck 7km W of Cobb, CA on Thu, Dec 17, 2020, 5:53 AM PST (13:53 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.6 9km WNW of Cobb, CA. This one was a foreshock.

Map

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

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 165 in the 60 days after this one and 102 in the 30 days before it.

The first 60 of 165.

From the USGS Earthquake Hazards Program and its partner networks, event nc73499360. Read Sun, Oct 4, 2026, 1:35 PM UTC.