M1.6 earthquake 4 km NNW of Round Valley, California

A magnitude 1.6 earthquake struck 4 km NNW of Round Valley, California on Mon, Mar 25, 1985, 12:29 PM PST (20:29 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M1.7 4 km SW of Aspen Springs, California. 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: 200 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event nc44689. Read Tue, Sep 22, 2026, 11:20 AM UTC.