M3.2 earthquake 26 km W of Three Rocks, California

A magnitude 3.2 earthquake struck 26 km W of Three Rocks, California on Mon, Mar 17, 1975, 8:07 PM PDT (03:07 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.7 31 km W of Lockwood, 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: 191 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 191.

From the USGS Earthquake Hazards Program and its partner networks, event nc1023241. Read Tue, Sep 22, 2026, 8:50 PM UTC.