M1.6 earthquake 5km NE of Anza, CA

A magnitude 1.6 earthquake struck 5km NE of Anza, CA on Sat, Jul 25, 1981, 11:03 PM PDT (06:03 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M4.0 8km NE of Julian, 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: 187 in the 60 days after this one and 132 in the 30 days before it.

The first 60 of 187.

From the USGS Earthquake Hazards Program and its partner networks, event ci520143. Read Tue, Sep 29, 2026, 4:43 PM UTC.