Idaho earthquakes

M1.6 earthquake 30 km WNW of Mackay, Idaho

A magnitude 1.6 earthquake struck 30 km WNW of Mackay, Idaho on Sat, Aug 15, 2015, 12:26 AM MDT (06:26 UTC), 12 km (7 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

A larger quake followed: M1.9 6 km NW of Challis, Idaho. 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 (mc), micro
Local time
UTC
2015-08-15 06:26:47 UTC
Depth
11.5 km (7.1 mi), shallow
Epicenter
44.056° N, 113.938° W
Region
Idaho
Tsunami flag
No
Status
Automatic solution, may be revised

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

An automatic solution; a seismologist may revise it.

Location uncertainty
About 1.1 km horizontally, 1.7 km in depth
Magnitude uncertainty
±0.50
Station coverage gap
104°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 37 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.96 km NW of Challis, Idaho · 4055 days ago · 4 km deep · 62 km away
  2. 1.87 km NW of Challis, Idaho · 4054 days ago · 6 km deep · 63 km away
  3. 2.09 km NNE of Stanley, Idaho · 4053 days ago · 13 km deep · 79 km away
  4. 1.68 km NE of Stanley, Idaho · 4053 days ago · 6 km deep · 78 km away
  5. 2.121 km E of Challis, Idaho · 4051 days ago · 13 km deep · 47 km away
  6. 2.15 km NNW of Challis, Idaho · 4050 days ago · 11 km deep · 61 km away
  7. 1.910 km SE of Challis, Idaho · 4049 days ago · 11 km deep · 46 km away
  8. 2.339 km NNW of Challis, Idaho · 4048 days ago · 15 km deep · 95 km away
  9. 2.711 km SE of Challis, Idaho · 4039 days ago · 5 km deep · 45 km away · felt by 1
  10. 2.315 km SE of Challis, Idaho · 4039 days ago · 7 km deep · 42 km away
  11. 2.712 km SE of Challis, Idaho · 4039 days ago · 6 km deep · 44 km away
  12. 2.615 km SE of Challis, Idaho · 4039 days ago · 5 km deep · 41 km away
  13. 1.913 km SE of Challis, Idaho · 4039 days ago · 9 km deep · 43 km away
  14. 1.636 km SSW of Salmon, Idaho · 4039 days ago · 10 km deep · 95 km away
  15. 1.515 km SE of Challis, Idaho · 4039 days ago · 7 km deep · 41 km away
  16. 1.912 km ESE of Challis, Idaho · 4034 days ago · 4 km deep · 45 km away
  17. 2.411 km SE of Challis, Idaho · 4033 days ago · 11 km deep · 46 km away
  18. 2.524 km SE of Challis, Idaho · 4032 days ago · 10 km deep · 32 km away
  19. 2.524 km NW of Clayton, Idaho · 4030 days ago · 8 km deep · 68 km away
  20. 1.913 km SE of Challis, Idaho · 4026 days ago · 13 km deep · 43 km away
  21. 2.030 km E of Clayton, Idaho · 4024 days ago · 5 km deep · 20 km away
  22. 3.310 km SE of Challis, Idaho · 4023 days ago · 10 km deep · 46 km away · felt by 4
  23. 2.013 km W of Clayton, Idaho · 4021 days ago · 9 km deep · 54 km away
  24. 1.513 km W of Clayton, Idaho · 4021 days ago · 10 km deep · 54 km away
  25. 1.914 km W of Clayton, Idaho · 4020 days ago · 6 km deep · 56 km away
  26. 2.826 km W of Challis, Idaho · 4019 days ago · 5 km deep · 73 km away
  27. 1.8southern Idaho · 4019 days ago · 10 km deep · 60 km away
  28. 1.64 km NNW of Challis, Idaho · 4018 days ago · 8 km deep · 60 km away
  29. 1.629 km N of Sun Valley, Idaho · 4009 days ago · 7 km deep · 38 km away
  30. 2.011 km SE of Challis, Idaho · 4006 days ago · 6 km deep · 46 km away
  31. 2.122 km WNW of Clayton, Idaho · 4002 days ago · 7 km deep · 65 km away
  32. 1.522 km WNW of Clayton, Idaho · 4002 days ago · 4 km deep · 66 km away
  33. 1.94 km NNW of Challis, Idaho · 4002 days ago · -1 km deep · 60 km away
  34. 2.014 km SE of Challis, Idaho · 4001 days ago · 10 km deep · 42 km away · felt by 1
  35. 1.929 km N of Sun Valley, Idaho · 4000 days ago · 10 km deep · 38 km away
  36. 1.814 km SE of Challis, Idaho · 3999 days ago · 11 km deep · 42 km away
  37. 1.632 km ESE of Clayton, Idaho · 3997 days ago · 4 km deep · 16 km away

Before

  1. 2.127 km S of Lost River, Idaho · 4066 days ago · 19 km deep · 74 km away
  2. 2.010 km NW of Challis, Idaho · 4075 days ago · 9 km deep · 66 km away
  3. 2.311 km NW of Challis, Idaho · 4075 days ago · 11 km deep · 67 km away
  4. 2.238 km NNE of Challis, Idaho · 4077 days ago · 14 km deep · 83 km away
  5. 2.113 km SE of Challis, Idaho · 4078 days ago · 14 km deep · 44 km away
  6. 1.914 km SE of Challis, Idaho · 4078 days ago · 13 km deep · 42 km away
  7. 2.311 km SE of Challis, Idaho · 4078 days ago · 10 km deep · 46 km away
  8. 2.613 km NW of Challis, Idaho · 4080 days ago · 9 km deep · 68 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb15764151. Read Tue, Sep 22, 2026, 9:29 PM UTC.