Montana earthquakes

M2.3 earthquake 16 km NNE of Dillon, Montana

A magnitude 2.3 earthquake struck 16 km NNE of Dillon, Montana on Tue, Jan 23, 2018, 9:27 AM MST (16:27 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.7 11 km NW of Harrison, Montana. This one was a foreshock.

Dillon forecastMore in Montana

Map

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

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The earthquake

Magnitude
2.3 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2018-01-23 16:27:21 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
45.358° N, 112.578° 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, 1.3 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
115°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 2.111 km SSE of Ennis, Montana · 3152 days ago · 3 km deep · 70 km away
  2. 2.3Western Montana · 3145 days ago · 2 km deep · 72 km away
  3. 1.534 km S of Virginia City, Montana · 3130 days ago · 4 km deep · 66 km away
  4. 1.69 km SSE of Harrison, Montana · 3120 days ago · 1 km deep · 71 km away
  5. 1.722 km NE of Lima, Montana · 3117 days ago · 9 km deep · 70 km away
  6. 2.711 km NW of Harrison, Montana · 3115 days ago · 11 km deep · 71 km away · felt by 1

Before

  1. 2.613 km S of Whitehall, Montana · 3175 days ago · 5 km deep · 57 km away · felt by 2
  2. 1.814 km NW of Twin Bridges, Montana · 3176 days ago · 4 km deep · 34 km away
  3. 1.530 km NNE of Spencer, Idaho · 3177 days ago · 10 km deep · 90 km away
  4. 1.834 km SSE of Virginia City, Montana · 3184 days ago · 7 km deep · 73 km away
  5. 2.237 km SSE of Virginia City, Montana · 3184 days ago · 5 km deep · 76 km away
  6. 2.19 km SSE of Lima, Montana · 3187 days ago · 8 km deep · 89 km away
  7. 1.58 km NW of Ennis, Montana · 3195 days ago · 3 km deep · 61 km away
  8. 2.018 km N of Dillon, Montana · 3196 days ago · 6 km deep · 3 km away
  9. 2.316 km S of Whitehall, Montana · 3199 days ago · 4 km deep · 54 km away · felt by 1
  10. 2.143 km NE of Spencer, Idaho · 3202 days ago · 10 km deep · 93 km away
  11. 2.417 km SSW of Whitehall, Montana · 3204 days ago · 5 km deep · 51 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80278569. Read Fri, Oct 2, 2026, 4:06 PM UTC.