M1.8 earthquake 42km SSW of Tonopah, NV

A magnitude 1.8 earthquake struck 42km SSW of Tonopah, NV on Mon, Sep 28, 1981, 9:05 AM PDT (16:05 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M1.9 43km SSW of Tonopah, NV. 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: 37 in the 60 days after this one and 4 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ci523708. Read Mon, Sep 21, 2026, 4:52 PM UTC.