Montana earthquakes

M1.9 earthquake 16 km S of Mammoth, Wyoming

A magnitude 1.9 earthquake struck 16 km S of Mammoth, Wyoming on Wed, Aug 20, 2014, 1:21 PM MDT (19:21 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.2 13 km S 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
1.9 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2014-08-20 19:21:52 UTC
Depth
4.1 km (2.6 mi), shallow
Epicenter
44.825° N, 110.688° 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, 0.8 km in depth
Magnitude uncertainty
±0.28
Depth from
FROM_LOCATION
Station coverage gap
110°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 25 in the 30 days before it.

After

  1. 1.66 km ESE of Hebgen Lake Estates, Montana · 4427 days ago · 6 km deep · 34 km away
  2. 2.05 km ESE of Hebgen Lake Estates, Montana · 4426 days ago · 13 km deep · 35 km away
  3. 1.515 km W of Hebgen Lake Estates, Montana · 4422 days ago · 9 km deep · 55 km away
  4. 1.654 km SE of West Yellowstone, Montana · 4421 days ago · 2 km deep · 53 km away
  5. 1.640 km SSE of Mammoth, Wyoming · 4409 days ago · 4 km deep · 26 km away
  6. 1.633 km E of West Yellowstone, Montana · 4405 days ago · 4 km deep · 24 km away
  7. 1.633 km ESE of West Yellowstone, Montana · 4405 days ago · 6 km deep · 25 km away
  8. 1.638 km SSE of Mammoth, Wyoming · 4402 days ago · 5 km deep · 24 km away
  9. 1.928 km WNW of Hebgen Lake Estates, Montana · 4402 days ago · 12 km deep · 66 km away
  10. 1.715 km S of Mammoth, Wyoming · 4400 days ago · 4 km deep · 2 km away
  11. 1.834 km E of West Yellowstone, Montana · 4399 days ago · 5 km deep · 22 km away
  12. 1.947 km ESE of West Yellowstone, Montana · 4398 days ago · 4 km deep · 38 km away
  13. 1.737 km S of Silver Gate, Montana · 4393 days ago · 16 km deep · 57 km away
  14. 3.213 km S of Mammoth, Wyoming · 4392 days ago · 6 km deep · 3 km away
  15. 1.631 km ESE of West Yellowstone, Montana · 4392 days ago · 7 km deep · 25 km away
  16. 2.321 km SSW of Mammoth, Wyoming · 4391 days ago · 5 km deep · 11 km away
  17. 1.821 km SSW of Mammoth, Wyoming · 4391 days ago · 4 km deep · 10 km away
  18. 1.821 km SSW of Mammoth, Wyoming · 4391 days ago · 3 km deep · 11 km away
  19. 2.021 km SSW of Mammoth, Wyoming · 4391 days ago · 4 km deep · 11 km away
  20. 1.621 km SSW of Mammoth, Wyoming · 4391 days ago · 2 km deep · 11 km away
  21. 1.624 km SSW of Mammoth, Wyoming · 4390 days ago · 5 km deep · 10 km away
  22. 1.521 km SSW of Mammoth, Wyoming · 4389 days ago · 3 km deep · 11 km away
  23. 1.530 km ESE of Island Park, Idaho · 4382 days ago · 7 km deep · 56 km away
  24. 1.544 km ENE of Warm River, Idaho · 4381 days ago · 4 km deep · 66 km away
  25. 1.622 km WNW of Hebgen Lake Estates, Montana · 4375 days ago · 11 km deep · 61 km away
  26. 1.612 km NE of West Yellowstone, Montana · 4371 days ago · 10 km deep · 27 km away
  27. 1.741 km NE of Spencer, Idaho · 4369 days ago · 11 km deep · 96 km away
  28. 1.925 km SSE of Mammoth, Wyoming · 4369 days ago · 4 km deep · 14 km away
  29. 1.519 km ESE of West Yellowstone, Montana · 4368 days ago · 4 km deep · 30 km away

Before

  1. 1.64 km NNE of Hebgen Lake Estates, Montana · 4428 days ago · 11 km deep · 38 km away
  2. 1.74 km ESE of Hebgen Lake Estates, Montana · 4428 days ago · 11 km deep · 36 km away
  3. 1.54 km ESE of Hebgen Lake Estates, Montana · 4428 days ago · 12 km deep · 36 km away
  4. 1.64 km E of Hebgen Lake Estates, Montana · 4428 days ago · 13 km deep · 36 km away
  5. 1.84 km ESE of Hebgen Lake Estates, Montana · 4429 days ago · 13 km deep · 36 km away
  6. 2.04 km E of Hebgen Lake Estates, Montana · 4429 days ago · 13 km deep · 36 km away
  7. 1.65 km ESE of Hebgen Lake Estates, Montana · 4429 days ago · 11 km deep · 36 km away
  8. 1.55 km ESE of Hebgen Lake Estates, Montana · 4429 days ago · 12 km deep · 35 km away
  9. 1.84 km E of Hebgen Lake Estates, Montana · 4429 days ago · 13 km deep · 36 km away
  10. 1.64 km E of Hebgen Lake Estates, Montana · 4429 days ago · 13 km deep · 36 km away
  11. 1.637 km SE of West Yellowstone, Montana · 4431 days ago · 3 km deep · 48 km away
  12. 2.143 km NNE of Spencer, Idaho · 4431 days ago · 15 km deep · 98 km away
  13. 1.750 km SE of West Yellowstone, Montana · 4431 days ago · 2 km deep · 49 km away
  14. 1.950 km SE of West Yellowstone, Montana · 4431 days ago · 2 km deep · 49 km away
  15. 2.050 km SE of West Yellowstone, Montana · 4431 days ago · 2 km deep · 48 km away
  16. 1.550 km SE of West Yellowstone, Montana · 4431 days ago · 2 km deep · 49 km away
  17. 1.51 km ENE of Hebgen Lake Estates, Montana · 4432 days ago · 13 km deep · 39 km away
  18. 2.238 km S of Silver Gate, Montana · 4434 days ago · 11 km deep · 61 km away
  19. 2.245 km SSE of Mammoth, Wyoming · 4439 days ago · 2 km deep · 31 km away
  20. 1.89 km NNE of West Yellowstone, Montana · 4441 days ago · 12 km deep · 31 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60081767. Read Sat, Oct 3, 2026, 5:23 PM UTC.