M1.6 earthquake 6 km WNW of Round Valley, California

A magnitude 1.6 earthquake struck 6 km WNW of Round Valley, California on Sun, Mar 3, 1985, 6:53 AM PST (14:53 UTC), 2 km (2 mi) below the surface.

A larger quake followed: M2.3 5 km SSE of Swall Meadows, 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 nc42700. Read Tue, Sep 22, 2026, 11:21 AM UTC.