M1.8 earthquake 31km W of Coso Junction, CA

A magnitude 1.8 earthquake struck 31km W of Coso Junction, CA on Mon, Feb 20, 1984, 5:06 AM PST (13:06 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.3 26km NNE of Kernville, CA. 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: 200 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event ci32011. Read Tue, Sep 22, 2026, 8:58 PM UTC.