Montana earthquakes

M1.8 earthquake 27 km S of Mammoth, Wyoming

A magnitude 1.8 earthquake struck 27 km S of Mammoth, Wyoming on Wed, Jul 9, 2014, 12:13 PM MDT (18:13 UTC), 5 km (3 mi) below the surface.

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

A larger quake followed: M2.2 24 km SSW of Mammoth, Wyoming. This one was a foreshock.

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

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The earthquake

Magnitude
1.8 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2014-07-09 18:13:42 UTC
Depth
5.2 km (3.2 mi), shallow
Epicenter
44.733° N, 110.769° W
Region
Montana
Tsunami flag
No
Status
Automatic solution, may be revised

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

An automatic solution; a seismologist may revise it.

Location uncertainty
About 0.4 km horizontally, 1.3 km in depth
Magnitude uncertainty
±0.40
Station coverage gap
140°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 35 in the 60 days after this one and 29 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60076887. Read Fri, Oct 2, 2026, 3:20 PM UTC.