M1.6 earthquake 23 km S of Mammoth, Wyoming

A magnitude 1.6 earthquake struck 23 km S of Mammoth, Wyoming on Sun, Mar 30, 2014, 9:13 AM MDT (15:13 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.1 25 km S of Mammoth, Wyoming. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

4 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 144 in the 60 days after this one and 115 in the 30 days before it.

The first 60 of 144.

From the USGS Earthquake Hazards Program and its partner networks, event uu60062042. Read Fri, Oct 2, 2026, 9:57 AM UTC.