M2.2 earthquake 18 km NE of Upper Lake, California

A magnitude 2.2 earthquake struck 18 km NE of Upper Lake, California on Fri, Feb 10, 1984, 1:23 PM PST (21:23 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M2.5 5 km SW 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: 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 nc5701. Read Tue, Sep 22, 2026, 12:15 PM UTC.