M2.1 earthquake 28km W of Olancha, CA

A magnitude 2.1 earthquake struck 28km W of Olancha, CA on Mon, Dec 12, 1983, 1:08 PM PST (21:08 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.6 17km NE 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 ci27151. Read Tue, Sep 22, 2026, 11:20 AM UTC.