M1.8 earthquake 16 km S of Mammoth, Wyoming

A magnitude 1.8 earthquake struck 16 km S of Mammoth, Wyoming on Tue, Oct 28, 2014, 1:01 AM MDT (07:01 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.3 34 km S of Virginia City, Montana. 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: 68 in the 60 days after this one and 15 in the 30 days before it.

The first 60 of 68.

From the USGS Earthquake Hazards Program and its partner networks, event uu60089892. Read Fri, Oct 2, 2026, 7:30 PM UTC.