M1.9 earthquake 27 km W of Three Rocks, California

A magnitude 1.9 earthquake struck 27 km W of Three Rocks, California on Sun, Jun 3, 1984, 6:52 AM PDT (13:52 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.2 25 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: 184 in the 60 days after this one and 8 in the 30 days before it.

The first 60 of 184.

From the USGS Earthquake Hazards Program and its partner networks, event nc20042 (also filed as ci41534). Read Tue, Sep 22, 2026, 10:27 PM UTC.