M1.6 earthquake 68km WSW of Tonopah, NV

A magnitude 1.6 earthquake struck 68km WSW of Tonopah, NV on Tue, Apr 7, 1981, 4:14 AM PST (12:14 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.1 13km NE of Mammoth Lakes, 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: 198 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 198.

From the USGS Earthquake Hazards Program and its partner networks, event ci513937. Read Tue, Sep 22, 2026, 9:41 PM UTC.