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

A magnitude 1.7 earthquake struck 23 km SSW of Three Rocks, California on Mon, Oct 25, 1982, 4:37 PM PDT (23:37 UTC), 9 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: 188 in the 60 days after this one and 111 in the 30 days before it.

The first 60 of 188.

From the USGS Earthquake Hazards Program and its partner networks, event nc1080816. Read Sun, Sep 27, 2026, 8:33 PM UTC.