M2.5 earthquake 10 km ESE of Williams, California

A magnitude 2.5 earthquake struck 10 km ESE of Williams, California on Thu, May 30, 1985, 8:13 PM PDT (03:13 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M3.1 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: 178 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 178.

From the USGS Earthquake Hazards Program and its partner networks, event nc48798. Read Tue, Sep 22, 2026, 4:09 PM UTC.