M1.9 earthquake 4 km E of Sunol, California

A magnitude 1.9 earthquake struck 4 km E of Sunol, California on Mon, Apr 7, 1980, 2:57 PM PST (22:57 UTC), 10 km (7 mi) below the surface.

A larger quake followed: M2.0 6 km SSE 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 nc1051998. Read Tue, Sep 22, 2026, 9:39 PM UTC.