Montana earthquakes

M1.7 earthquake 8 km SSW of Dillon, MT

A magnitude 1.7 earthquake struck 8 km SSW of Dillon, MT on Sun, Aug 12, 2018, 7:04 PM MDT (01:04 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.5 45 km NNE of Spencer, Idaho. This one was a foreshock.

Dillon forecastMore in Montana

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
1.7 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2018-08-13 01:04:37 UTC
Depth
6.8 km (4.2 mi), shallow
Epicenter
45.284° N, 112.611° 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 0.4 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
159°
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: 12 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 2.333 km WNW of Lima, Montana · 2965 days ago · 16 km deep · 60 km away
  2. 2.126 km ENE of Wisdom, Montana · 2962 days ago · 3 km deep · 67 km away
  3. 2.545 km NNE of Spencer, Idaho · 2961 days ago · 5 km deep · 74 km away
  4. 2.46 km W of Willow Creek, Montana · 2957 days ago · 3 km deep · 91 km away
  5. 1.821 km N of Salmon, Idaho · 2957 days ago · 4 km deep · 99 km away
  6. 2.37 km W of Willow Creek, Montana · 2955 days ago · 5 km deep · 92 km away
  7. 2.26 km W of Willow Creek, Montana · 2954 days ago · 3 km deep · 91 km away
  8. 1.717 km S of Whitehall, Montana · 2952 days ago · 6 km deep · 61 km away
  9. 2.126 km SSW of Lima, Montana · 2950 days ago · 8 km deep · 98 km away
  10. 1.933 km WNW of Twin Bridges, Montana · 2949 days ago · 1 km deep · 38 km away
  11. 1.944 km W of Hebgen Lake Estates, Montana · 2947 days ago · 10 km deep · 90 km away
  12. 2.016 km S of Whitehall, Montana · 2918 days ago · 3 km deep · 62 km away

Before

  1. 2.144 km W of Hebgen Lake Estates, Montana · 2977 days ago · 11 km deep · 91 km away
  2. 2.217 km S of Whitehall, Montana · 2985 days ago · 4 km deep · 61 km away
  3. 1.617 km S of Whitehall, Montana · 2987 days ago · 5 km deep · 61 km away
  4. 1.917 km S of Whitehall, Montana · 2994 days ago · 5 km deep · 61 km away
  5. 2.416 km WNW of Pony, Montana · 2994 days ago · 5 km deep · 61 km away
  6. 1.817 km S of Whitehall, Montana · 2995 days ago · 5 km deep · 61 km away
  7. 2.915 km S of Whitehall, Montana · 2995 days ago · 3 km deep · 62 km away · felt by 4
  8. 3.317 km S of Whitehall, Montana · 2995 days ago · 10 km deep · 61 km away · felt by 14
  9. 1.744 km W of Hebgen Lake Estates, Montana · 2999 days ago · 11 km deep · 91 km away
  10. 1.637 km NW of Island Park, Idaho · 3001 days ago · 5 km deep · 99 km away

Earthquakes todayMontana earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80305704. Read Mon, Oct 5, 2026, 3:16 AM UTC.