M1.7 earthquake 30km W of Olancha, CA

A magnitude 1.7 earthquake struck 30km W of Olancha, CA on Sun, Jul 17, 1983, 10:50 PM PDT (05:50 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.0 2km NNW 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: 123 in the 60 days after this one and 52 in the 30 days before it.

The first 60 of 123.

From the USGS Earthquake Hazards Program and its partner networks, event ci10656. Read Mon, Oct 5, 2026, 2:45 PM UTC.