Idaho earthquakes

M2.3 earthquake 39 km NNW of Challis, Idaho

A magnitude 2.3 earthquake struck 39 km NNW of Challis, Idaho on Sun, Aug 23, 2015, 4:41 PM MDT (22:41 UTC), 15 km (10 mi) below the surface.

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

A larger quake followed: M3.3 10 km SE of Challis, Idaho. This one was a foreshock.

Challis forecastMore in Idaho

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.3 (Mc), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2015-08-23 22:41:54 UTC
Depth
15.3 km (9.5 mi), shallow
Epicenter
44.837° N, 114.422° 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 0.8 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.50
Station coverage gap
83°
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 13 in the 30 days before it.

After

  1. 2.711 km SE of Challis, Idaho · 4048 days ago · 5 km deep · 50 km away · felt by 1
  2. 2.315 km SE of Challis, Idaho · 4048 days ago · 7 km deep · 54 km away
  3. 2.712 km SE of Challis, Idaho · 4048 days ago · 6 km deep · 51 km away
  4. 2.615 km SE of Challis, Idaho · 4048 days ago · 5 km deep · 55 km away
  5. 1.913 km SE of Challis, Idaho · 4048 days ago · 9 km deep · 52 km away
  6. 1.636 km SSW of Salmon, Idaho · 4048 days ago · 10 km deep · 23 km away
  7. 1.515 km SE of Challis, Idaho · 4048 days ago · 7 km deep · 54 km away
  8. 2.138 km NE of Yellow Pine, Idaho · 4045 days ago · 5 km deep · 65 km away
  9. 2.236 km NE of Yellow Pine, Idaho · 4045 days ago · 11 km deep · 71 km away
  10. 1.912 km ESE of Challis, Idaho · 4043 days ago · 4 km deep · 51 km away
  11. 2.411 km SE of Challis, Idaho · 4042 days ago · 11 km deep · 50 km away
  12. 2.524 km SE of Challis, Idaho · 4041 days ago · 10 km deep · 64 km away
  13. 2.524 km NW of Clayton, Idaho · 4039 days ago · 8 km deep · 54 km away
  14. 1.913 km SE of Challis, Idaho · 4036 days ago · 13 km deep · 53 km away
  15. 2.030 km E of Clayton, Idaho · 4033 days ago · 5 km deep · 75 km away
  16. 3.310 km SE of Challis, Idaho · 4032 days ago · 10 km deep · 49 km away · felt by 4
  17. 2.013 km W of Clayton, Idaho · 4030 days ago · 9 km deep · 67 km away
  18. 1.513 km W of Clayton, Idaho · 4030 days ago · 10 km deep · 68 km away
  19. 1.914 km W of Clayton, Idaho · 4029 days ago · 6 km deep · 65 km away
  20. 2.826 km W of Challis, Idaho · 4028 days ago · 5 km deep · 35 km away
  21. 1.8southern Idaho · 4028 days ago · 10 km deep · 35 km away
  22. 1.64 km NNW of Challis, Idaho · 4028 days ago · 8 km deep · 35 km away
  23. 1.629 km N of Sun Valley, Idaho · 4018 days ago · 7 km deep · 97 km away
  24. 2.011 km SE of Challis, Idaho · 4015 days ago · 6 km deep · 49 km away
  25. 2.122 km WNW of Clayton, Idaho · 4011 days ago · 7 km deep · 57 km away
  26. 1.522 km WNW of Clayton, Idaho · 4011 days ago · 4 km deep · 57 km away
  27. 1.94 km NNW of Challis, Idaho · 4011 days ago · -1 km deep · 35 km away
  28. 2.014 km SE of Challis, Idaho · 4010 days ago · 10 km deep · 53 km away · felt by 1
  29. 1.929 km N of Sun Valley, Idaho · 4009 days ago · 10 km deep · 98 km away
  30. 1.814 km SE of Challis, Idaho · 4008 days ago · 11 km deep · 53 km away
  31. 1.632 km ESE of Clayton, Idaho · 4006 days ago · 4 km deep · 79 km away
  32. 2.113 km SE of Challis, Idaho · 4000 days ago · 10 km deep · 52 km away
  33. 1.722 km ESE of Challis, Idaho · 4000 days ago · 9 km deep · 58 km away
  34. 2.5southern Idaho · 4000 days ago · 4 km deep · 54 km away
  35. 2.07 km ESE of Challis, Idaho · 3998 days ago · 9 km deep · 46 km away
  36. 2.510 km ESE of Challis, Idaho · 3998 days ago · 11 km deep · 48 km away
  37. 3.08 km ESE of Challis, Idaho · 3997 days ago · 7 km deep · 46 km away · felt by 1

Before

  1. 1.910 km SE of Challis, Idaho · 4058 days ago · 11 km deep · 49 km away
  2. 2.15 km NNW of Challis, Idaho · 4059 days ago · 11 km deep · 34 km away
  3. 2.121 km E of Challis, Idaho · 4060 days ago · 13 km deep · 54 km away
  4. 1.68 km NE of Stanley, Idaho · 4062 days ago · 6 km deep · 72 km away
  5. 2.09 km NNE of Stanley, Idaho · 4063 days ago · 13 km deep · 71 km away
  6. 1.87 km NW of Challis, Idaho · 4063 days ago · 6 km deep · 33 km away
  7. 1.96 km NW of Challis, Idaho · 4064 days ago · 4 km deep · 33 km away
  8. 1.630 km WNW of Mackay, Idaho · 4066 days ago · 12 km deep · 95 km away
  9. 2.010 km NW of Challis, Idaho · 4084 days ago · 9 km deep · 29 km away
  10. 2.311 km NW of Challis, Idaho · 4084 days ago · 11 km deep · 28 km away
  11. 2.238 km NNE of Challis, Idaho · 4086 days ago · 14 km deep · 34 km away
  12. 2.113 km SE of Challis, Idaho · 4087 days ago · 14 km deep · 52 km away
  13. 1.914 km SE of Challis, Idaho · 4087 days ago · 13 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb15520380. Read Thu, Oct 1, 2026, 11:06 PM UTC.