M2.1 earthquake 3 km W of Glen Ellen, California

A magnitude 2.1 earthquake struck 3 km W of Glen Ellen, California on Thu, Sep 12, 1985, 10:23 AM PDT (17:23 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.4 6 km W of Cobb, 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: 164 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 164.

From the USGS Earthquake Hazards Program and its partner networks, event nc55032. Read Tue, Sep 22, 2026, 10:32 PM UTC.