M1.7 earthquake 7 km ENE of Sunol, California

A magnitude 1.7 earthquake struck 7 km ENE of Sunol, California on Mon, Aug 6, 1984, 5:57 PM PDT (00:57 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M4.4 11 km ESE of East Foothills, 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: 131 in the 60 days after this one and 96 in the 30 days before it.

The first 60 of 131.

From the USGS Earthquake Hazards Program and its partner networks, event nc25075. Read Wed, Sep 30, 2026, 6:10 PM UTC.