M2.4 earthquake 12km SSE of Anza, CA

A magnitude 2.4 earthquake struck 12km SSE of Anza, CA on Tue, Feb 3, 1981, 10:20 AM PST (18:20 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.7 6km NNE of Yucaipa, 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: 193 in the 60 days after this one and 111 in the 30 days before it.

The first 60 of 193.

From the USGS Earthquake Hazards Program and its partner networks, event ci12254071. Read Sat, Oct 3, 2026, 3:32 PM UTC.