M1.5 earthquake 2 km NNW of Clearlake, California

A magnitude 1.5 earthquake struck 2 km NNW of Clearlake, California on Sat, Aug 17, 1985, 10:16 PM PDT (05:16 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M1.8 9 km ESE of Willits, 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: 181 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 181.

From the USGS Earthquake Hazards Program and its partner networks, event nc1130508. Read Tue, Sep 22, 2026, 8:45 PM UTC.