M1.5 earthquake 5 km ESE of Pleasanton, California

A magnitude 1.5 earthquake struck 5 km ESE of Pleasanton, California on Tue, Feb 4, 1986, 4:47 AM PST (12:47 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M1.5 17 km NE 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: 198 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 198.

From the USGS Earthquake Hazards Program and its partner networks, event nc65721. Read Wed, Sep 23, 2026, 4:24 AM UTC.