Montana earthquakes

M1.7 earthquake 50 km ESE of West Yellowstone, Montana

A magnitude 1.7 earthquake struck 50 km ESE of West Yellowstone, Montana on Mon, Oct 30, 2017, 11:05 PM MDT (05:05 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.3 37 km S of Silver Gate, Montana. 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: 1.7 (ML, local (Richter)), micro
Magnitude from: University of Utah Seismograph Stations
Local time: Mon, Oct 30, 2017, 11:05 PM MDT
UTC: 2017-10-31 05:05:57 UTC
Depth: 3.5 km (2.2 mi), shallow
Epicenter: 44.447° 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 0.2 km horizontally, 0.6 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 70°
Stations used: 15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 17 in the 30 days before it.

After

Before

Earthquakes today Montana earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60255607. Read Thu, Oct 1, 2026, 8:52 PM UTC.