M1.7 earthquake 15 km WNW of Three Rocks, California

A magnitude 1.7 earthquake struck 15 km WNW of Three Rocks, California on Sat, Aug 30, 1986, 4:43 AM PDT (11:43 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M3.4 15 km NW of Coalinga, 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: 170 in the 60 days after this one and 94 in the 30 days before it.

The first 60 of 170.

From the USGS Earthquake Hazards Program and its partner networks, event nc80669. Read Mon, Sep 28, 2026, 2:22 PM UTC.