M3.4 earthquake 23 km SE of Mammoth, Wyoming

A magnitude 3.4 earthquake struck 23 km SE of Mammoth, Wyoming on Sat, Jan 11, 2014, 6:46 PM MST (01:46 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M3.5 26 km ENE of West Yellowstone, Montana. This one was a foreshock.

Map

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

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.37	ML, local (Richter)	University of Utah Seismograph Stations	Preferred · Final · ±0.17 · 6 stations
3.4	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.2 · 6 stations

2 people reported to the USGS what they felt; the strongest reported shaking was II, 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: 154 in the 60 days after this one and 33 in the 30 days before it.

The first 60 of 154.

From the USGS Earthquake Hazards Program and its partner networks, event uu60051622 (also filed as usc000m1ce). Read Mon, Oct 5, 2026, 1:35 AM UTC.