Montana earthquakes

M2.2 earthquake 24 km NNE of Lima, Montana

A magnitude 2.2 earthquake struck 24 km NNE of Lima, Montana on Thu, Dec 21, 2017, 8:41 AM MST (15:41 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M2.3 16 km NNE of Dillon, 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
2.2 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2017-12-21 15:41:39 UTC
Depth
0.8 km (0.5 mi), shallow
Epicenter
44.845° N, 112.507° 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 0.6 km horizontally, 2.3 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
89°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.143 km NE of Spencer, Idaho · 3202 days ago · 10 km deep · 53 km away
  2. 2.018 km N of Dillon, Montana · 3196 days ago · 6 km deep · 60 km away
  3. 1.58 km NW of Ennis, Montana · 3195 days ago · 3 km deep · 83 km away
  4. 2.19 km SSE of Lima, Montana · 3186 days ago · 8 km deep · 33 km away
  5. 2.237 km SSE of Virginia City, Montana · 3184 days ago · 5 km deep · 60 km away
  6. 1.834 km SSE of Virginia City, Montana · 3184 days ago · 7 km deep · 59 km away
  7. 1.530 km NNE of Spencer, Idaho · 3177 days ago · 10 km deep · 40 km away
  8. 1.814 km NW of Twin Bridges, Montana · 3176 days ago · 4 km deep · 89 km away
  9. 2.316 km NNE of Dillon, Montana · 3174 days ago · 8 km deep · 57 km away
  10. 2.111 km SSE of Ennis, Montana · 3152 days ago · 3 km deep · 78 km away

Before

  1. 2.918 km SSW of Whitehall, Montana · 3210 days ago · 5 km deep · 100 km away
  2. 1.717 km WNW of Twin Bridges, Montana · 3212 days ago · 5 km deep · 85 km away
  3. 1.740 km NNE of Spencer, Idaho · 3213 days ago · 7 km deep · 47 km away
  4. 2.27 km SW of Hebgen Lake Estates, Montana · 3223 days ago · 15 km deep · 99 km away
  5. 2.033 km N of Spencer, Idaho · 3224 days ago · 7 km deep · 34 km away
  6. 2.442 km NNE of Spencer, Idaho · 3228 days ago · 6 km deep · 47 km away
  7. 2.019 km W of Hebgen Lake Estates, Montana · 3232 days ago · 14 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80275559. Read Fri, Oct 2, 2026, 2:03 PM UTC.