Montana earthquakes

M1.9 earthquake 21 km NW of Dillon, Montana

A magnitude 1.9 earthquake struck 21 km NW of Dillon, Montana on Fri, Jul 22, 2016, 3:50 PM MDT (21:50 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M4.0 16 km S of Whitehall, 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), micro
Local time
UTC
2016-07-22 21:50:21 UTC
Depth
12.1 km (7.5 mi), shallow
Epicenter
45.352° N, 112.827° 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 0.7 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
97°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 3.217 km S of Whitehall, Montana · 3702 days ago · 9 km deep · 68 km away
  2. 1.616 km S of Whitehall, Montana · 3701 days ago · 4 km deep · 69 km away
  3. 2.617 km S of Whitehall, Montana · 3697 days ago · 1 km deep · 68 km away
  4. 1.715 km SSE of Pony, Montana · 3690 days ago · 2 km deep · 80 km away
  5. 1.913 km N of Dillon, Montana · 3689 days ago · 6 km deep · 17 km away
  6. 1.618 km S of Whitehall, Montana · 3685 days ago · 5 km deep · 68 km away
  7. 1.56 km W of Dillon, Montana · 3683 days ago · 4 km deep · 18 km away
  8. 4.016 km S of Whitehall, Montana · 3678 days ago · 8 km deep · 69 km away · felt by 21
  9. 2.216 km S of Whitehall, Montana · 3678 days ago · 7 km deep · 68 km away
  10. 3.316 km S of Whitehall, Montana · 3677 days ago · 8 km deep · 69 km away · felt by 6
  11. 2.917 km S of Whitehall, Montana · 3677 days ago · 8 km deep · 68 km away
  12. 1.717 km S of Whitehall, Montana · 3676 days ago · 2 km deep · 68 km away
  13. 1.717 km S of Whitehall, Montana · 3676 days ago · 4 km deep · 68 km away
  14. 1.516 km SSW of Alder, Montana · 3674 days ago · 9 km deep · 56 km away
  15. 1.616 km S of Whitehall, Montana · 3673 days ago · 5 km deep · 69 km away
  16. 3.316 km S of Whitehall, Montana · 3671 days ago · 7 km deep · 69 km away · felt by 2
  17. 1.916 km S of Whitehall, Montana · 3667 days ago · 4 km deep · 68 km away
  18. 2.317 km S of Whitehall, Montana · 3666 days ago · 3 km deep · 68 km away
  19. 2.029 km SSE of Virginia City, Montana · 3665 days ago · 8 km deep · 84 km away
  20. 1.517 km S of Whitehall, Montana · 3665 days ago · 4 km deep · 67 km away

Before

  1. 1.95 km SW of Dillon, Montana · 3731 days ago · 12 km deep · 22 km away
  2. 2.212 km NNE of Dillon, Montana · 3736 days ago · 8 km deep · 18 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80162854. Read Wed, Sep 30, 2026, 6:23 AM UTC.