Montana earthquakes

M1.9 earthquake 6 km NE of Logan, Montana

A magnitude 1.9 earthquake struck 6 km NE of Logan, Montana on Fri, Aug 10, 2018, 3:05 PM MDT (21:05 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.4 6 km W of Willow Creek, 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
1.9 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2018-08-10 21:05:19 UTC
Depth
2.5 km (1.6 mi), shallow
Epicenter
45.929° N, 111.371° 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 0.5 km horizontally, 2.2 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
85°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.46 km W of Willow Creek, Montana · 2956 days ago · 3 km deep · 30 km away
  2. 1.81 km NE of Boulder, Montana · 2955 days ago · 7 km deep · 67 km away
  3. 2.37 km W of Willow Creek, Montana · 2954 days ago · 5 km deep · 30 km away
  4. 2.26 km W of Willow Creek, Montana · 2953 days ago · 3 km deep · 30 km away
  5. 1.717 km S of Whitehall, Montana · 2951 days ago · 6 km deep · 63 km away
  6. 1.74 km WSW of Three Forks, Montana · 2935 days ago · 3 km deep · 20 km away
  7. 1.910 km ESE of Bozeman, Montana · 2929 days ago · 4 km deep · 47 km away
  8. 2.01 km W of Manhattan, Montana · 2926 days ago · 5 km deep · 8 km away
  9. 2.016 km S of Whitehall, Montana · 2917 days ago · 3 km deep · 63 km away

Before

  1. 2.217 km S of Whitehall, Montana · 2985 days ago · 4 km deep · 63 km away
  2. 1.617 km S of Whitehall, Montana · 2986 days ago · 5 km deep · 63 km away
  3. 1.84 km W of Ponderosa Pines, Montana · 2992 days ago · 4 km deep · 12 km away
  4. 1.917 km S of Whitehall, Montana · 2993 days ago · 5 km deep · 63 km away
  5. 2.416 km WNW of Pony, Montana · 2993 days ago · 5 km deep · 62 km away
  6. 1.817 km S of Whitehall, Montana · 2994 days ago · 5 km deep · 63 km away
  7. 2.915 km S of Whitehall, Montana · 2994 days ago · 3 km deep · 63 km away · felt by 4
  8. 3.317 km S of Whitehall, Montana · 2994 days ago · 10 km deep · 63 km away · felt by 14
  9. 2.615 km SSE of Elkhorn, Montana · 3001 days ago · 7 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80305459. Read Sun, Oct 4, 2026, 8:31 AM UTC.