Montana earthquakes

M2.4 earthquake 23 km SSW of Mammoth, Wyoming

A magnitude 2.4 earthquake struck 23 km SSW of Mammoth, Wyoming on Wed, Aug 29, 2018, 1:44 PM MDT (19:44 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.9 25 km ESE of Mammoth, Wyoming. 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
2.4 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2018-08-29 19:44:34 UTC
Depth
4.8 km (3.0 mi), shallow
Epicenter
44.773° N, 110.798° 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, 0.6 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
84°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 28 in the 60 days after this one and 21 in the 30 days before it.

After

  1. 2.222 km SSW of Mammoth, Wyoming · 2955 days ago · 5 km deep · 1 km away
  2. 1.545 km SSE of Mammoth, Wyoming · 2949 days ago · 4 km deep · 34 km away
  3. 1.639 km S of Silver Gate, Montana · 2947 days ago · 13 km deep · 63 km away
  4. 1.640 km S of Silver Gate, Montana · 2946 days ago · 10 km deep · 61 km away
  5. 1.944 km W of Hebgen Lake Estates, Montana · 2944 days ago · 10 km deep · 75 km away
  6. 2.925 km ESE of Mammoth, Wyoming · 2943 days ago · 11 km deep · 31 km away
  7. 2.035 km ESE of Island Park, Idaho · 2941 days ago · 4 km deep · 48 km away
  8. 1.714 km S of West Yellowstone, Montana · 2937 days ago · 13 km deep · 36 km away
  9. 1.754 km SE of West Yellowstone, Montana · 2935 days ago · 6 km deep · 49 km away
  10. 1.647 km ENE of Warm River, Idaho · 2928 days ago · 11 km deep · 58 km away
  11. 1.910 km ESE of Bozeman, Montana · 2926 days ago · 4 km deep · 98 km away
  12. 1.734 km S of Silver Gate, Montana · 2924 days ago · 17 km deep · 64 km away
  13. 2.713 km NE of West Yellowstone, Montana · 2920 days ago · 10 km deep · 15 km away
  14. 2.323 km SW of Mammoth, Wyoming · 2919 days ago · 7 km deep · 8 km away
  15. 1.746 km ENE of Warm River, Idaho · 2918 days ago · 4 km deep · 60 km away
  16. 1.531 km ESE of Island Park, Idaho · 2917 days ago · 8 km deep · 49 km away
  17. 1.545 km SSE of Mammoth, Wyoming · 2916 days ago · 2 km deep · 34 km away
  18. 1.711 km NNE of Tetonia, Idaho · 2915 days ago · 11 km deep · 99 km away · felt by 1
  19. 1.745 km ENE of Warm River, Idaho · 2913 days ago · 6 km deep · 55 km away
  20. 2.610 km NNE of West Yellowstone, Montana · 2911 days ago · 7 km deep · 19 km away
  21. 1.53 km ESE of Big Sky, Montana · 2909 days ago · 13 km deep · 70 km away
  22. 2.011 km NNE of West Yellowstone, Montana · 2908 days ago · 7 km deep · 19 km away
  23. 2.212 km NNE of West Yellowstone, Montana · 2908 days ago · 9 km deep · 19 km away
  24. 1.818 km NE of West Yellowstone, Montana · 2904 days ago · 9 km deep · 10 km away
  25. 1.518 km NE of West Yellowstone, Montana · 2904 days ago · 9 km deep · 10 km away
  26. 2.772 km ESE of West Yellowstone, Montana · 2902 days ago · 10 km deep · 61 km away · felt by 1
  27. 2.123 km SW of Mammoth, Wyoming · 2901 days ago · 5 km deep · 8 km away
  28. 1.646 km SE of West Yellowstone, Montana · 2899 days ago · 3 km deep · 45 km away

Before

  1. 2.323 km SSW of Mammoth, Wyoming · 2955 days ago · 5 km deep · 0 km away
  2. 1.823 km SSW of Mammoth, Wyoming · 2955 days ago · 5 km deep · 1 km away
  3. 2.545 km NNE of Spencer, Idaho · 2958 days ago · 5 km deep · 98 km away
  4. 2.047 km ESE of West Yellowstone, Montana · 2958 days ago · 4 km deep · 38 km away
  5. 2.047 km ESE of West Yellowstone, Montana · 2958 days ago · 4 km deep · 38 km away
  6. 1.747 km ESE of West Yellowstone, Montana · 2958 days ago · 4 km deep · 38 km away
  7. 1.7Wyoming · 2958 days ago · 4 km deep · 38 km away
  8. 1.647 km ESE of West Yellowstone, Montana · 2958 days ago · 4 km deep · 38 km away
  9. 1.947 km ESE of West Yellowstone, Montana · 2958 days ago · 4 km deep · 38 km away
  10. 1.849 km ESE of West Yellowstone, Montana · 2964 days ago · 6 km deep · 40 km away
  11. 1.513 km E of Hebgen Lake Estates, Montana · 2968 days ago · 10 km deep · 18 km away
  12. 1.6Idaho-Montana border region · 2968 days ago · 10 km deep · 18 km away
  13. 1.845 km ENE of Warm River, Idaho · 2969 days ago · 7 km deep · 58 km away
  14. 2.144 km W of Hebgen Lake Estates, Montana · 2974 days ago · 11 km deep · 75 km away
  15. 1.717 km ENE of Hebgen Lake Estates, Montana · 2975 days ago · 11 km deep · 15 km away
  16. 2.536 km S of Silver Gate, Montana · 2978 days ago · 15 km deep · 61 km away
  17. 1.65 km E of Hebgen Lake Estates, Montana · 2981 days ago · 10 km deep · 26 km away
  18. 1.65 km E of Hebgen Lake Estates, Montana · 2981 days ago · 10 km deep · 26 km away
  19. 2.15 km E of Hebgen Lake Estates, Montana · 2982 days ago · 11 km deep · 26 km away
  20. 2.15 km E of Hebgen Lake Estates, Montana · 2982 days ago · 11 km deep · 25 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60294837. Read Fri, Oct 2, 2026, 4:29 AM UTC.