M1.5 earthquake 21 km SSW of Mammoth, Wyoming

A magnitude 1.5 earthquake struck 21 km SSW of Mammoth, Wyoming on Sat, May 31, 2014, 11:29 PM MDT (05:29 UTC), 4 km (3 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

A larger quake followed: M3.5 21 km SSW of Mammoth, Wyoming. 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.

An automatic solution; a seismologist may revise it.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 112 in the 60 days after this one and 60 in the 30 days before it.

The first 60 of 112.

From the USGS Earthquake Hazards Program and its partner networks, event uu60005125. Read Fri, Oct 2, 2026, 5:15 PM UTC.