Montana earthquakes

M1.6 earthquake 25 km SE of Mammoth, Wyoming

A magnitude 1.6 earthquake struck 25 km SE of Mammoth, Wyoming on Tue, Apr 28, 2015, 7:57 PM MDT (01:57 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.0 50 km SSE of Mammoth, Wyoming. This one was a foreshock.

Gardiner 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
1.6 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2015-04-29 01:57:57 UTC
Depth
5.9 km (3.6 mi), shallow
Epicenter
44.798° N, 110.494° 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 0.5 km horizontally, 1.6 km in depth
Magnitude uncertainty
±0.27
Depth from
From location
Station coverage gap
108°
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: 25 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.78 km NNW of Big Sky, Montana · 4172 days ago · 11 km deep · 94 km away
  2. 1.5Idaho-Montana border region · 4170 days ago · 8 km deep · 52 km away
  3. 1.74 km SE of Hebgen Lake Estates, Montana · 4170 days ago · 10 km deep · 53 km away
  4. 2.14 km SE of Hebgen Lake Estates, Montana · 4170 days ago · 9 km deep · 53 km away
  5. 2.04 km SE of Hebgen Lake Estates, Montana · 4166 days ago · 10 km deep · 53 km away
  6. 1.635 km E of West Yellowstone, Montana · 4164 days ago · 5 km deep · 24 km away
  7. 1.524 km SSE of West Yellowstone, Montana · 4162 days ago · 6 km deep · 52 km away
  8. 1.74 km SE of Hebgen Lake Estates, Montana · 4162 days ago · 10 km deep · 53 km away
  9. 3.050 km SSE of Mammoth, Wyoming · 4156 days ago · 4 km deep · 25 km away · felt by 8
  10. 2.250 km SSE of Mammoth, Wyoming · 4156 days ago · 5 km deep · 26 km away
  11. 2.115 km WSW of Livingston, Montana · 4153 days ago · 12 km deep · 94 km away
  12. 1.641 km SE of West Yellowstone, Montana · 4143 days ago · 6 km deep · 55 km away
  13. 1.713 km SE of West Yellowstone, Montana · 4142 days ago · 14 km deep · 47 km away
  14. 1.519 km NE of West Yellowstone, Montana · 4133 days ago · 8 km deep · 33 km away
  15. 1.624 km SSE of West Yellowstone, Montana · 4132 days ago · 5 km deep · 53 km away
  16. 2.448 km SE of West Yellowstone, Montana · 4130 days ago · 4 km deep · 51 km away
  17. 1.848 km SE of West Yellowstone, Montana · 4130 days ago · 4 km deep · 50 km away
  18. 1.548 km SE of West Yellowstone, Montana · 4130 days ago · 4 km deep · 50 km away
  19. 1.6Wyoming · 4124 days ago · 5 km deep · 23 km away
  20. 1.935 km E of West Yellowstone, Montana · 4124 days ago · 2 km deep · 22 km away
  21. 1.8Wyoming · 4123 days ago · 2 km deep · 9 km away
  22. 2.529 km E of West Yellowstone, Montana · 4122 days ago · 8 km deep · 26 km away
  23. 1.720 km SSE of Mammoth, Wyoming · 4121 days ago · 3 km deep · 9 km away
  24. 1.738 km SSE of Mammoth, Wyoming · 4119 days ago · 5 km deep · 14 km away
  25. 1.925 km SE of Mammoth, Wyoming · 4119 days ago · 5 km deep · 1 km away

Before

  1. 2.251 km SE of Mammoth, Wyoming · 4178 days ago · 5 km deep · 26 km away
  2. 2.029 km ESE of West Yellowstone, Montana · 4186 days ago · 5 km deep · 33 km away
  3. 2.125 km ESE of West Yellowstone, Montana · 4188 days ago · 6 km deep · 38 km away
  4. 1.545 km ENE of Warm River, Idaho · 4191 days ago · 5 km deep · 67 km away
  5. 2.245 km ENE of Warm River, Idaho · 4191 days ago · 7 km deep · 66 km away
  6. 1.65 km ESE of Hebgen Lake Estates, Montana · 4195 days ago · 12 km deep · 50 km away
  7. 1.730 km NNE of Alta, Wyoming · 4202 days ago · 10 km deep · 93 km away
  8. 1.825 km WSW of Corwin Springs, Montana · 4203 days ago · 15 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60109237. Read Sun, Oct 4, 2026, 6:21 AM UTC.