Idaho earthquakes

M2.6 earthquake 9 km NW of Challis, Idaho

A magnitude 2.6 earthquake struck 9 km NW of Challis, Idaho on Tue, Apr 28, 2015, 9:12 AM MDT (15:12 UTC), 6 km (4 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
2.6 (Mc), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2015-04-28 15:12:22 UTC
Depth
6.2 km (3.9 mi), shallow
Epicenter
44.564° N, 114.312° 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.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

An automatic solution; a seismologist may revise it.

Location uncertainty
About 0.8 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.50
Station coverage gap
54°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.011 km SE of Challis, Idaho · 4175 days ago · 9 km deep · 20 km away
  2. 2.311 km NNE of Stanley, Idaho · 4175 days ago · 13 km deep · 52 km away
  3. 1.910 km NNE of Stanley, Idaho · 4173 days ago · 11 km deep · 53 km away
  4. 2.010 km NE of Stanley, Idaho · 4172 days ago · 8 km deep · 53 km away
  5. 2.99 km NW of Challis, Idaho · 4170 days ago · 7 km deep · 1 km away
  6. 1.811 km NNE of Stanley, Idaho · 4168 days ago · 11 km deep · 52 km away
  7. 2.410 km NNE of Stanley, Idaho · 4167 days ago · 11 km deep · 54 km away
  8. 1.911 km NNE of Stanley, Idaho · 4167 days ago · 9 km deep · 53 km away
  9. 2.710 km NNE of Stanley, Idaho · 4167 days ago · 13 km deep · 54 km away
  10. 2.08 km NNE of Stanley, Idaho · 4167 days ago · 10 km deep · 55 km away
  11. 2.010 km NE of Stanley, Idaho · 4167 days ago · 12 km deep · 53 km away
  12. 1.811 km NNE of Stanley, Idaho · 4167 days ago · 11 km deep · 54 km away
  13. 2.011 km NNE of Stanley, Idaho · 4167 days ago · 13 km deep · 53 km away
  14. 2.112 km NNE of Stanley, Idaho · 4167 days ago · 13 km deep · 53 km away
  15. 2.011 km NNE of Stanley, Idaho · 4166 days ago · 11 km deep · 53 km away
  16. 3.012 km NNE of Stanley, Idaho · 4166 days ago · 12 km deep · 53 km away · felt by 2
  17. 1.810 km NE of Stanley, Idaho · 4166 days ago · 13 km deep · 52 km away
  18. 1.911 km NNE of Stanley, Idaho · 4166 days ago · 12 km deep · 53 km away
  19. 2.111 km NNE of Stanley, Idaho · 4166 days ago · 14 km deep · 52 km away
  20. 2.612 km NNE of Stanley, Idaho · 4160 days ago · 18 km deep · 52 km away
  21. 3.312 km SE of Challis, Idaho · 4157 days ago · 6 km deep · 22 km away · felt by 2
  22. 3.011 km NNE of Stanley, Idaho · 4156 days ago · 13 km deep · 53 km away
  23. 2.012 km SE of Challis, Idaho · 4151 days ago · 10 km deep · 22 km away
  24. 1.98 km NW of Challis, Idaho · 4149 days ago · 8 km deep · 1 km away
  25. 2.311 km ESE of Challis, Idaho · 4148 days ago · 12 km deep · 20 km away
  26. 1.617 km S of Clayton, Idaho · 4144 days ago · 7 km deep · 52 km away
  27. 1.540 km ESE of Salmon, Idaho · 4143 days ago · 10 km deep · 93 km away
  28. 2.337 km NW of Challis, Idaho · 4138 days ago · 11 km deep · 28 km away
  29. 2.09 km NW of Challis, Idaho · 4138 days ago · 7 km deep · 1 km away
  30. 3.214 km SE of Challis, Idaho · 4137 days ago · 5 km deep · 24 km away
  31. 1.635 km SSE of Salmon, Idaho · 4136 days ago · 10 km deep · 55 km away
  32. 2.322 km NNE of Sun Valley, Idaho · 4135 days ago · 13 km deep · 75 km away
  33. 2.313 km WNW of Clayton, Idaho · 4134 days ago · 12 km deep · 37 km away

Before

  1. 2.69 km NW of Challis, Idaho · 4177 days ago · 7 km deep · 1 km away · felt by 3
  2. 2.312 km NW of Challis, Idaho · 4177 days ago · 5 km deep · 3 km away
  3. 2.89 km NW of Challis, Idaho · 4178 days ago · 8 km deep · 1 km away · felt by 2
  4. 2.116 km W of Clayton, Idaho · 4178 days ago · 11 km deep · 41 km away
  5. 1.923 km SW of Leadore, Idaho · 4178 days ago · 11 km deep · 59 km away
  6. 2.337 km NW of Challis, Idaho · 4183 days ago · 11 km deep · 28 km away
  7. 2.67 km SE of Challis, Idaho · 4184 days ago · 12 km deep · 16 km away
  8. 1.623 km SW of Leadore, Idaho · 4194 days ago · 13 km deep · 59 km away
  9. 2.110 km SE of Challis, Idaho · 4201 days ago · 12 km deep · 20 km away
  10. 2.518 km NE of Leadore, Idaho · 4202 days ago · 12 km deep · 93 km away
  11. 2.08 km SE of Challis, Idaho · 4203 days ago · 12 km deep · 17 km away
  12. 2.115 km NNW of Challis, Idaho · 4207 days ago · 4 km deep · 7 km away
  13. 2.012 km N of Challis, Idaho · 4207 days ago · 11 km deep · 8 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb15515785. Read Sun, Oct 4, 2026, 4:14 PM UTC.