Idaho earthquakes

M1.8 earthquake 21 km W of Challis, Idaho

A magnitude 1.8 earthquake struck 21 km W of Challis, Idaho on Fri, Feb 26, 2016, 1:56 AM MST (08:56 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.6 15 km NE 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
1.8 (ml), micro
Local time
UTC
2016-02-26 08:56:37 UTC
Depth
3.4 km (2.1 mi), shallow
Epicenter
44.542° N, 114.502° W
Region
Idaho
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 1.0 km horizontally, 6.6 km in depth
Magnitude uncertainty
±0.20
Depth from
Operator assigned
Station coverage gap
137°
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 30 in the 60 days after this one and 26 in the 30 days before it.

After

  1. 2.022 km WNW of Challis, Idaho · 3868 days ago · 7 km deep · 1 km away
  2. 2.316 km NNE of Challis, Idaho · 3867 days ago · 6 km deep · 31 km away
  3. 3.615 km NE of Challis, Idaho · 3867 days ago · 7 km deep · 31 km away · felt by 9
  4. 1.722 km WNW of Challis, Idaho · 3866 days ago · 5 km deep · 0 km away
  5. 2.114 km NE of Challis, Idaho · 3866 days ago · 5 km deep · 31 km away
  6. 1.622 km WNW of Challis, Idaho · 3866 days ago · 4 km deep · 1 km away
  7. 2.122 km W of Challis, Idaho · 3865 days ago · 5 km deep · 0 km away
  8. 1.724 km WNW of Challis, Idaho · 3865 days ago · 8 km deep · 3 km away
  9. 1.623 km W of Challis, Idaho · 3865 days ago · 2 km deep · 2 km away
  10. 1.714 km NE of Challis, Idaho · 3865 days ago · -2 km deep · 32 km away
  11. 2.223 km WNW of Challis, Idaho · 3865 days ago · 7 km deep · 2 km away
  12. 2.013 km SE of Challis, Idaho · 3864 days ago · 5 km deep · 34 km away
  13. 1.622 km WNW of Challis, Idaho · 3864 days ago · 7 km deep · 2 km away
  14. 1.514 km W of Clayton, Idaho · 3863 days ago · 6 km deep · 33 km away
  15. 2.523 km W of Challis, Idaho · 3862 days ago · 1 km deep · 2 km away
  16. 1.714 km NE of Challis, Idaho · 3861 days ago · 5 km deep · 33 km away
  17. 1.822 km W of Challis, Idaho · 3858 days ago · 4 km deep · 1 km away
  18. 2.614 km NE of Challis, Idaho · 3852 days ago · 10 km deep · 31 km away
  19. 1.8southern Idaho · 3852 days ago · 7 km deep · 17 km away
  20. 1.525 km SE of Challis, Idaho · 3852 days ago · 5 km deep · 46 km away
  21. 2.2southern Idaho · 3852 days ago · 9 km deep · 31 km away
  22. 1.622 km WNW of Challis, Idaho · 3849 days ago · 3 km deep · 1 km away
  23. 1.917 km NNE of Challis, Idaho · 3848 days ago · 5 km deep · 32 km away · felt by 1
  24. 1.622 km WNW of Challis, Idaho · 3846 days ago · 5 km deep · 2 km away
  25. 1.510 km SE of Challis, Idaho · 3841 days ago · 5 km deep · 31 km away
  26. 1.629 km E of Clayton, Idaho · 3839 days ago · 5 km deep · 51 km away
  27. 1.722 km WNW of Challis, Idaho · 3838 days ago · 6 km deep · 1 km away
  28. 1.919 km NE of Challis, Idaho · 3831 days ago · 7 km deep · 36 km away
  29. 1.514 km NE of Challis, Idaho · 3816 days ago · 6 km deep · 31 km away
  30. 1.64 km NW of Challis, Idaho · 3811 days ago · 7 km deep · 18 km away

Before

  1. 3.314 km NNE of Challis, Idaho · 3868 days ago · 6 km deep · 30 km away · felt by 1
  2. 3.223 km WNW of Challis, Idaho · 3868 days ago · 7 km deep · 2 km away
  3. 1.823 km WNW of Challis, Idaho · 3870 days ago · 5 km deep · 1 km away
  4. 1.722 km WNW of Challis, Idaho · 3873 days ago · 7 km deep · 2 km away
  5. 2.223 km WNW of Challis, ID · 3873 days ago · 6 km deep · 1 km away
  6. 1.622 km W of Challis, Idaho · 3873 days ago · 5 km deep · 1 km away
  7. 1.914 km SE of Challis, Idaho · 3878 days ago · 7 km deep · 35 km away
  8. 1.512 km SE of Challis, Idaho · 3879 days ago · 6 km deep · 33 km away
  9. 1.810 km NW of Challis, Idaho · 3880 days ago · -1 km deep · 14 km away
  10. 1.920 km SE of Challis, Idaho · 3880 days ago · 3 km deep · 40 km away
  11. 1.512 km SE of Challis, Idaho · 3881 days ago · 6 km deep · 33 km away
  12. 2.212 km SE of Challis, Idaho · 3885 days ago · 8 km deep · 33 km away
  13. 1.813 km SE of Challis, Idaho · 3885 days ago · 7 km deep · 34 km away
  14. 2.315 km W of Clayton, Idaho · 3886 days ago · 8 km deep · 31 km away
  15. 1.822 km WNW of Challis, Idaho · 3892 days ago · 6 km deep · 1 km away
  16. 1.622 km WNW of Challis, Idaho · 3892 days ago · 5 km deep · 2 km away
  17. 1.819 km SE of Challis, Idaho · 3892 days ago · 2 km deep · 40 km away
  18. 2.32 km NNW of Challis, Idaho · 3893 days ago · 8 km deep · 20 km away
  19. 1.64 km NNW of Challis, Idaho · 3894 days ago · 5 km deep · 20 km away
  20. 1.7southern Idaho · 3894 days ago · 1 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80126639. Read Tue, Sep 29, 2026, 1:06 PM UTC.