M1.5 earthquake 48 km SE of Mammoth, Wyoming

A magnitude 1.5 earthquake struck 48 km SE of Mammoth, Wyoming on Sun, May 18, 2014, 6:40 PM MDT (00:40 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: 136 in the 60 days after this one and 36 in the 30 days before it.

The first 60 of 136.

From the USGS Earthquake Hazards Program and its partner networks, event uu60069192. Read Fri, Oct 2, 2026, 2:05 PM UTC.