M1.7 earthquake 23 km SSW of Three Rocks, California

A magnitude 1.7 earthquake struck 23 km SSW of Three Rocks, California on Sat, Oct 30, 1982, 6:01 AM PDT (13:01 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.7 16 km ESE of Tres Pinos, 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: 145 in the 60 days after this one and 139 in the 30 days before it.

The first 60 of 145.

From the USGS Earthquake Hazards Program and its partner networks, event nc1081155. Read Mon, Sep 28, 2026, 9:41 AM UTC.