M1.5 earthquake 20km NNE of Trona, CA

A magnitude 1.5 earthquake struck 20km NNE of Trona, CA on Thu, Dec 31, 1981, 5:10 AM PST (13:10 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.0 13km NE of Inyokern, 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: 99 in the 60 days after this one and 111 in the 30 days before it.

The first 60 of 99.

From the USGS Earthquake Hazards Program and its partner networks, event ci104119. Read Thu, Oct 1, 2026, 4:17 AM UTC.