Montana earthquakes

M1.6 earthquake 51 km SSE of Mammoth, Wyoming

A magnitude 1.6 earthquake struck 51 km SSE of Mammoth, Wyoming on Wed, Apr 20, 2016, 4:54 PM MDT (22:54 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.5 10 km NE of West Yellowstone, 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
1.6 (ml), micro
Local time
UTC
2016-04-20 22:54:29 UTC
Depth
2.6 km (1.6 mi), shallow
Epicenter
44.571° N, 110.389° 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, 0.5 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
88°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 18 in the 30 days before it.

After

  1. 1.820 km S of Mammoth, Wyoming · 3812 days ago · 4 km deep · 34 km away
  2. 2.020 km S of Mammoth, Wyoming · 3812 days ago · 4 km deep · 34 km away
  3. 1.819 km S of Mammoth, Wyoming · 3812 days ago · 4 km deep · 35 km away
  4. 1.619 km S of Mammoth, Wyoming · 3812 days ago · 4 km deep · 35 km away
  5. 1.955 km SE of West Yellowstone, Montana · 3812 days ago · 2 km deep · 33 km away
  6. 1.649 km SE of Mammoth, Wyoming · 3792 days ago · 3 km deep · 6 km away
  7. 2.45 km SW of Hebgen Lake Estates, Montana · 3789 days ago · 12 km deep · 70 km away
  8. 1.760 km ESE of West Yellowstone, Montana · 3787 days ago · 3 km deep · 17 km away
  9. 2.510 km NE of West Yellowstone, Montana · 3778 days ago · 8 km deep · 53 km away
  10. 1.811 km NE of West Yellowstone, Montana · 3778 days ago · 9 km deep · 53 km away
  11. 1.640 km S of Silver Gate, Montana · 3768 days ago · 10 km deep · 31 km away
  12. 2.061 km NNE of Kelly, Wyoming · 3762 days ago · 11 km deep · 53 km away
  13. 2.043 km SE of West Yellowstone, Montana · 3761 days ago · 2 km deep · 37 km away
  14. 1.620 km SSW of Mammoth, Wyoming · 3760 days ago · 2 km deep · 42 km away
  15. 2.146 km ENE of Warm River, Idaho · 3756 days ago · 10 km deep · 47 km away

Before

  1. 1.750 km SSE of Mammoth, Wyoming · 3815 days ago · 2 km deep · 1 km away
  2. 2.28 km ENE of Alta, Wyoming · 3817 days ago · 10 km deep · 99 km away
  3. 1.98 km ENE of Alta, Wyoming · 3817 days ago · 5 km deep · 99 km away
  4. 1.68 km ENE of Alta, Wyoming · 3817 days ago · 4 km deep · 98 km away
  5. 1.639 km SSE of Mammoth, Wyoming · 3817 days ago · 5 km deep · 12 km away
  6. 1.561 km ESE of West Yellowstone, Montana · 3818 days ago · 7 km deep · 19 km away
  7. 1.624 km SSW of Mammoth, Wyoming · 3825 days ago · 4 km deep · 41 km away
  8. 1.61 km NNW of Hebgen Lake Estates, Montana · 3826 days ago · 15 km deep · 68 km away
  9. 2.242 km SSE of Mammoth, Wyoming · 3836 days ago · 4 km deep · 9 km away
  10. 1.646 km SSE of Mammoth, Wyoming · 3839 days ago · 5 km deep · 6 km away
  11. 2.320 km SSE of Mammoth, Wyoming · 3841 days ago · 10 km deep · 31 km away
  12. 1.920 km SSE of Mammoth, Wyoming · 3841 days ago · 7 km deep · 31 km away
  13. 1.721 km SSE of Mammoth, Wyoming · 3842 days ago · 5 km deep · 30 km away
  14. 1.517 km SE of West Yellowstone, Montana · 3842 days ago · 10 km deep · 46 km away
  15. 1.816 km SE of West Yellowstone, Montana · 3842 days ago · 8 km deep · 46 km away
  16. 1.617 km SE of West Yellowstone, Montana · 3842 days ago · 8 km deep · 45 km away
  17. 1.613 km E of Alta, Wyoming · 3844 days ago · 7 km deep · 98 km away
  18. 1.937 km S of Silver Gate, Montana · 3845 days ago · 13 km deep · 33 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60146002. Read Wed, Sep 30, 2026, 11:54 PM UTC.