M2.1 earthquake 20km ESE of Anza, CA

A magnitude 2.1 earthquake struck 20km ESE of Anza, CA on Sun, Jan 31, 2021, 3:44 AM PST (11:44 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M3.8 11km WNW of Calipatria, 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: 197 in the 60 days after this one and 126 in the 30 days before it.

The first 60 of 197.

From the USGS Earthquake Hazards Program and its partner networks, event ci39536727. Read Sat, Oct 3, 2026, 4:15 PM UTC.