M1.7 earthquake 20km ESE of Anza, CA

A magnitude 1.7 earthquake struck 20km ESE of Anza, CA on Thu, Feb 6, 1986, 4:15 AM PST (12:15 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M1.8 8km N of Cabazon, 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: 190 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 190.

From the USGS Earthquake Hazards Program and its partner networks, event ci115281. Read Tue, Sep 22, 2026, 8:59 PM UTC.