M2.2 earthquake 21km ESE of Anza, CA

A magnitude 2.2 earthquake struck 21km ESE of Anza, CA on Tue, Oct 20, 1981, 10:23 AM PDT (17:23 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M3.3 10km NE of Aguanga, 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: 131 in the 60 days after this one and 42 in the 30 days before it.

The first 60 of 131.

From the USGS Earthquake Hazards Program and its partner networks, event ci525873. Read Tue, Sep 22, 2026, 8:27 PM UTC.