Idaho earthquakes

M2.3 earthquake 12 km NW of Challis, Idaho

A magnitude 2.3 earthquake struck 12 km NW of Challis, Idaho on Tue, Apr 28, 2015, 1:34 AM MDT (07:34 UTC), 5 km (3 mi) below the surface.

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

A larger quake followed: M3.3 12 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
2015-04-28 07:34:41 UTC
Depth
5.3 km (3.3 mi), shallow
Epicenter
44.582° N, 114.338° 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 0.7 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.50
Station coverage gap
54°
Stations used
33

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 36 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 2.69 km NW of Challis, Idaho · 4177 days ago · 7 km deep · 3 km away · felt by 3
  2. 2.69 km NW of Challis, Idaho · 4177 days ago · 6 km deep · 3 km away
  3. 2.011 km SE of Challis, Idaho · 4176 days ago · 9 km deep · 23 km away
  4. 2.311 km NNE of Stanley, Idaho · 4175 days ago · 13 km deep · 52 km away
  5. 1.910 km NNE of Stanley, Idaho · 4174 days ago · 11 km deep · 53 km away
  6. 2.010 km NE of Stanley, Idaho · 4172 days ago · 8 km deep · 52 km away
  7. 2.99 km NW of Challis, Idaho · 4170 days ago · 7 km deep · 3 km away
  8. 1.811 km NNE of Stanley, Idaho · 4168 days ago · 11 km deep · 52 km away
  9. 2.410 km NNE of Stanley, Idaho · 4168 days ago · 11 km deep · 53 km away
  10. 1.911 km NNE of Stanley, Idaho · 4168 days ago · 9 km deep · 53 km away
  11. 2.710 km NNE of Stanley, Idaho · 4168 days ago · 13 km deep · 53 km away
  12. 2.08 km NNE of Stanley, Idaho · 4167 days ago · 10 km deep · 55 km away
  13. 2.010 km NE of Stanley, Idaho · 4167 days ago · 12 km deep · 53 km away
  14. 1.811 km NNE of Stanley, Idaho · 4167 days ago · 11 km deep · 53 km away
  15. 2.011 km NNE of Stanley, Idaho · 4167 days ago · 13 km deep · 52 km away
  16. 2.112 km NNE of Stanley, Idaho · 4167 days ago · 13 km deep · 52 km away
  17. 2.011 km NNE of Stanley, Idaho · 4167 days ago · 11 km deep · 52 km away
  18. 3.012 km NNE of Stanley, Idaho · 4167 days ago · 12 km deep · 52 km away · felt by 2
  19. 1.810 km NE of Stanley, Idaho · 4166 days ago · 13 km deep · 52 km away
  20. 1.911 km NNE of Stanley, Idaho · 4166 days ago · 12 km deep · 52 km away
  21. 2.111 km NNE of Stanley, Idaho · 4166 days ago · 14 km deep · 52 km away
  22. 2.612 km NNE of Stanley, Idaho · 4160 days ago · 18 km deep · 51 km away
  23. 3.312 km SE of Challis, Idaho · 4157 days ago · 6 km deep · 25 km away · felt by 2
  24. 3.011 km NNE of Stanley, Idaho · 4156 days ago · 13 km deep · 53 km away
  25. 2.012 km SE of Challis, Idaho · 4151 days ago · 10 km deep · 25 km away
  26. 1.98 km NW of Challis, Idaho · 4150 days ago · 8 km deep · 4 km away
  27. 2.311 km ESE of Challis, Idaho · 4148 days ago · 12 km deep · 23 km away
  28. 1.617 km S of Clayton, Idaho · 4144 days ago · 7 km deep · 54 km away
  29. 1.540 km ESE of Salmon, Idaho · 4143 days ago · 10 km deep · 94 km away
  30. 2.337 km NW of Challis, Idaho · 4139 days ago · 11 km deep · 25 km away
  31. 2.09 km NW of Challis, Idaho · 4138 days ago · 7 km deep · 3 km away
  32. 3.214 km SE of Challis, Idaho · 4137 days ago · 5 km deep · 27 km away
  33. 1.635 km SSE of Salmon, Idaho · 4136 days ago · 10 km deep · 56 km away
  34. 2.322 km NNE of Sun Valley, Idaho · 4135 days ago · 13 km deep · 77 km away
  35. 2.313 km WNW of Clayton, Idaho · 4134 days ago · 12 km deep · 38 km away
  36. 2.027 km SSW of Yellow Pine, Idaho · 4119 days ago · 10 km deep · 99 km away

Before

  1. 2.89 km NW of Challis, Idaho · 4178 days ago · 8 km deep · 3 km away · felt by 2
  2. 2.116 km W of Clayton, Idaho · 4178 days ago · 11 km deep · 42 km away
  3. 1.923 km SW of Leadore, Idaho · 4178 days ago · 11 km deep · 61 km away
  4. 2.337 km NW of Challis, Idaho · 4184 days ago · 11 km deep · 25 km away
  5. 2.67 km SE of Challis, Idaho · 4184 days ago · 12 km deep · 19 km away
  6. 1.623 km SW of Leadore, Idaho · 4194 days ago · 13 km deep · 62 km away
  7. 2.110 km SE of Challis, Idaho · 4201 days ago · 12 km deep · 23 km away
  8. 2.518 km NE of Leadore, Idaho · 4202 days ago · 12 km deep · 95 km away
  9. 2.08 km SE of Challis, Idaho · 4203 days ago · 12 km deep · 20 km away
  10. 2.115 km NNW of Challis, Idaho · 4207 days ago · 4 km deep · 5 km away
  11. 2.012 km N of Challis, Idaho · 4207 days ago · 11 km deep · 9 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb15331945. Read Sun, Oct 4, 2026, 8:44 PM UTC.