Idaho earthquakes

M1.7 earthquake 22 km WNW of Challis, Idaho

A magnitude 1.7 earthquake struck 22 km WNW of Challis, Idaho on Sun, Feb 21, 2016, 1:35 PM MST (20:35 UTC), 7 km (4 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
1.7 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2016-02-21 20:35:02 UTC
Depth
6.6 km (4.1 mi), shallow
Epicenter
44.562° N, 114.499° 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 0.8 km horizontally, 3.1 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
139°
Stations used
7

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 35 in the 30 days before it.

After

  1. 1.823 km WNW of Challis, Idaho · 3873 days ago · 5 km deep · 2 km away
  2. 3.223 km WNW of Challis, Idaho · 3871 days ago · 7 km deep · 1 km away
  3. 3.314 km NNE of Challis, Idaho · 3871 days ago · 6 km deep · 29 km away · felt by 1
  4. 1.821 km W of Challis, Idaho · 3871 days ago · 3 km deep · 2 km away
  5. 2.022 km WNW of Challis, Idaho · 3871 days ago · 7 km deep · 2 km away
  6. 2.316 km NNE of Challis, Idaho · 3870 days ago · 6 km deep · 30 km away
  7. 3.615 km NE of Challis, Idaho · 3869 days ago · 7 km deep · 31 km away · felt by 9
  8. 1.722 km WNW of Challis, Idaho · 3869 days ago · 5 km deep · 2 km away
  9. 2.114 km NE of Challis, Idaho · 3869 days ago · 5 km deep · 31 km away
  10. 1.622 km WNW of Challis, Idaho · 3868 days ago · 4 km deep · 2 km away
  11. 2.122 km W of Challis, Idaho · 3868 days ago · 5 km deep · 2 km away
  12. 1.724 km WNW of Challis, Idaho · 3868 days ago · 8 km deep · 3 km away
  13. 1.623 km W of Challis, Idaho · 3868 days ago · 2 km deep · 4 km away
  14. 1.714 km NE of Challis, Idaho · 3868 days ago · -2 km deep · 31 km away
  15. 2.223 km WNW of Challis, Idaho · 3867 days ago · 7 km deep · 1 km away
  16. 2.013 km SE of Challis, Idaho · 3867 days ago · 5 km deep · 35 km away
  17. 1.622 km WNW of Challis, Idaho · 3867 days ago · 7 km deep · 0 km away
  18. 1.514 km W of Clayton, Idaho · 3866 days ago · 6 km deep · 35 km away
  19. 2.523 km W of Challis, Idaho · 3865 days ago · 1 km deep · 3 km away
  20. 1.714 km NE of Challis, Idaho · 3863 days ago · 5 km deep · 33 km away
  21. 1.822 km W of Challis, Idaho · 3860 days ago · 4 km deep · 2 km away
  22. 2.614 km NE of Challis, Idaho · 3855 days ago · 10 km deep · 30 km away
  23. 1.8southern Idaho · 3855 days ago · 7 km deep · 16 km away
  24. 1.525 km SE of Challis, Idaho · 3855 days ago · 5 km deep · 47 km away
  25. 2.2southern Idaho · 3854 days ago · 9 km deep · 31 km away
  26. 1.622 km WNW of Challis, Idaho · 3852 days ago · 3 km deep · 1 km away
  27. 1.917 km NNE of Challis, Idaho · 3850 days ago · 5 km deep · 31 km away · felt by 1
  28. 1.622 km WNW of Challis, Idaho · 3848 days ago · 5 km deep · 1 km away
  29. 1.510 km SE of Challis, Idaho · 3844 days ago · 5 km deep · 32 km away
  30. 1.629 km E of Clayton, Idaho · 3841 days ago · 5 km deep · 52 km away
  31. 1.722 km WNW of Challis, Idaho · 3841 days ago · 6 km deep · 2 km away
  32. 1.919 km NE of Challis, Idaho · 3834 days ago · 7 km deep · 35 km away
  33. 1.514 km NE of Challis, Idaho · 3818 days ago · 6 km deep · 31 km away

Before

  1. 2.223 km WNW of Challis, ID · 3875 days ago · 6 km deep · 2 km away
  2. 1.622 km W of Challis, Idaho · 3875 days ago · 5 km deep · 2 km away
  3. 1.914 km SE of Challis, Idaho · 3880 days ago · 7 km deep · 36 km away
  4. 1.512 km SE of Challis, Idaho · 3882 days ago · 6 km deep · 34 km away
  5. 1.810 km NW of Challis, Idaho · 3882 days ago · -1 km deep · 13 km away
  6. 1.920 km SE of Challis, Idaho · 3883 days ago · 3 km deep · 41 km away
  7. 1.512 km SE of Challis, Idaho · 3884 days ago · 6 km deep · 34 km away
  8. 2.212 km SE of Challis, Idaho · 3887 days ago · 8 km deep · 34 km away
  9. 1.813 km SE of Challis, Idaho · 3888 days ago · 7 km deep · 35 km away
  10. 2.315 km W of Clayton, Idaho · 3889 days ago · 8 km deep · 34 km away
  11. 1.822 km WNW of Challis, Idaho · 3894 days ago · 6 km deep · 2 km away
  12. 1.622 km WNW of Challis, Idaho · 3894 days ago · 5 km deep · 1 km away
  13. 1.819 km SE of Challis, Idaho · 3894 days ago · 2 km deep · 41 km away
  14. 2.32 km NNW of Challis, Idaho · 3896 days ago · 8 km deep · 20 km away
  15. 1.64 km NNW of Challis, Idaho · 3896 days ago · 5 km deep · 20 km away
  16. 1.7southern Idaho · 3897 days ago · 1 km deep · 43 km away
  17. 1.822 km SE of Challis, Idaho · 3897 days ago · 1 km deep · 42 km away
  18. 1.614 km SE of Challis, Idaho · 3897 days ago · 5 km deep · 36 km away
  19. 2.013 km NE of Challis, Idaho · 3898 days ago · 5 km deep · 30 km away
  20. 1.612 km NE of Challis, Idaho · 3899 days ago · 3 km deep · 30 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80126394. Read Fri, Oct 2, 2026, 3:16 AM UTC.