M3.3 earthquake 4 km ENE of Sunol, California

A magnitude 3.3 earthquake struck 4 km ENE of Sunol, California on Tue, Apr 8, 1980, 6:46 PM PST (02:46 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M3.3 3 km S of San Juan Bautista, 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: 163 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 163.

From the USGS Earthquake Hazards Program and its partner networks, event nc1052034. Read Tue, Sep 22, 2026, 8:55 PM UTC.