M2.8 earthquake 6 km NE of Ukiah, California

A magnitude 2.8 earthquake struck 6 km NE of Ukiah, California on Sun, Mar 26, 1978, 12:35 AM PST (08:35 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M3.2 5 km SE of Calpella, 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: 200 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event nc1039522. Read Tue, Sep 22, 2026, 8:50 PM UTC.