M1.9 earthquake 22km ESE of Anza, CA

A magnitude 1.9 earthquake struck 22km ESE of Anza, CA on Mon, Mar 25, 1985, 2:04 AM PST (10:04 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M3.7 11km NNE 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: 173 in the 60 days after this one and 185 in the 30 days before it.

The first 60 of 173.

From the USGS Earthquake Hazards Program and its partner networks, event ci61352. Read Mon, Sep 28, 2026, 9:48 AM UTC.