Montana earthquakes

M1.6 earthquake 21 km SE of Mammoth, Wyoming

A magnitude 1.6 earthquake struck 21 km SE of Mammoth, Wyoming on Sat, May 10, 2014, 12:58 PM MDT (18:58 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M3.5 21 km SSW of Mammoth, Wyoming. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.6 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2014-05-10 18:58:39 UTC
Depth
7.3 km (4.5 mi), shallow
Epicenter
44.816° N, 110.542° W
Region
Montana
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 1.1 km horizontally, 2.4 km in depth
Magnitude uncertainty
±0.83
Depth from
From location
Station coverage gap
148°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 145 in the 60 days after this one and 31 in the 30 days before it.

After

The first 60 of 145.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60068202. Read Fri, Oct 2, 2026, 1:10 PM UTC.