M2.3 earthquake 6 km ENE of Williams, California

A magnitude 2.3 earthquake struck 6 km ENE of Williams, California on Tue, Sep 17, 1985, 9:13 PM PDT (04:13 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M2.5 10 km N of Cloverdale, 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: 174 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 174.

From the USGS Earthquake Hazards Program and its partner networks, event nc55285. Read Wed, Sep 23, 2026, 5:06 AM UTC.