Idaho earthquakes

M1.9 earthquake 24 km SE of Challis, Idaho

A magnitude 1.9 earthquake struck 24 km SE of Challis, Idaho on Wed, Feb 28, 2018, 7:56 PM MST (02:56 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.6 21 km E of Stanley, 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
1.9 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2018-03-01 02:56:48 UTC
Depth
6.5 km (4.0 mi), shallow
Epicenter
44.350° N, 114.021° 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 1.7 km horizontally, 2.5 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
123°
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: 22 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 1.713 km W of Clayton, Idaho · 3138 days ago · 9 km deep · 45 km away
  2. 2.012 km W of Clayton, Idaho · 3138 days ago · 7 km deep · 44 km away
  3. 1.814 km W of Clayton, Idaho · 3138 days ago · 6 km deep · 46 km away
  4. 1.814 km W of Clayton, Idaho · 3138 days ago · 6 km deep · 45 km away
  5. 1.848 km WNW of Challis, Idaho · 3125 days ago · 5 km deep · 71 km away
  6. 2.621 km E of Stanley, Idaho · 3125 days ago · 21 km deep · 55 km away
  7. 2.113 km W of Clayton, Idaho · 3125 days ago · 8 km deep · 44 km away
  8. 2.628 km SW of Stanley, Idaho · 3125 days ago · 5 km deep · 97 km away · felt by 3
  9. 1.911 km N of Stanley, Idaho · 3123 days ago · 10 km deep · 73 km away
  10. 1.611 km WNW of Clayton, Idaho · 3120 days ago · 7 km deep · 42 km away
  11. 2.414 km NW of Challis, Idaho · 3119 days ago · 5 km deep · 39 km away · felt by 2
  12. 1.77 km NNW of Challis, Idaho · 3117 days ago · 3 km deep · 31 km away
  13. 1.914 km W of Clayton, Idaho · 3108 days ago · 4 km deep · 45 km away
  14. 1.622 km NNW of Clayton, Idaho · 3107 days ago · 5 km deep · 42 km away
  15. 1.812 km W of Clayton, Idaho · 3099 days ago · 3 km deep · 44 km away
  16. 1.819 km W of Lima, Montana · 3098 days ago · 13 km deep · 99 km away
  17. 2.022 km SSE of Clayton, Idaho · 3097 days ago · 17 km deep · 34 km away
  18. 1.714 km W of Clayton, Idaho · 3094 days ago · 4 km deep · 46 km away
  19. 2.0southern Idaho · 3086 days ago · 11 km deep · 45 km away
  20. 2.114 km W of Clayton, Idaho · 3084 days ago · 3 km deep · 45 km away
  21. 2.313 km W of Clayton, Idaho · 3083 days ago · 11 km deep · 44 km away
  22. 1.913 km W of Clayton, Idaho · 3079 days ago · 7 km deep · 45 km away

Before

  1. 2.212 km W of Clayton, Idaho · 3153 days ago · 10 km deep · 44 km away
  2. 2.317 km W of Clayton, Idaho · 3156 days ago · 5 km deep · 49 km away
  3. 2.213 km W of Clayton, Idaho · 3156 days ago · 16 km deep · 45 km away
  4. 1.921 km WSW of Clayton, Idaho · 3157 days ago · 9 km deep · 53 km away
  5. 1.714 km NW of Challis, Idaho · 3158 days ago · 3 km deep · 39 km away
  6. 1.913 km NW of Challis, Idaho · 3158 days ago · 16 km deep · 37 km away
  7. 2.021 km E of Stanley, Idaho · 3159 days ago · 7 km deep · 55 km away
  8. 1.713 km W of Clayton, Idaho · 3160 days ago · 3 km deep · 45 km away
  9. 1.820 km WSW of Clayton, Idaho · 3160 days ago · 11 km deep · 52 km away
  10. 2.318 km WSW of Clayton, Idaho · 3160 days ago · 7 km deep · 50 km away
  11. 2.516 km E of Stanley, Idaho · 3160 days ago · 5 km deep · 58 km away
  12. 2.59 km WNW of Clayton, Idaho · 3165 days ago · 10 km deep · 40 km away
  13. 2.520 km W of Clayton, Idaho · 3167 days ago · 10 km deep · 50 km away · felt by 3
  14. 2.013 km W of Clayton, Idaho · 3167 days ago · 3 km deep · 45 km away
  15. 1.810 km WNW of Clayton, Idaho · 3168 days ago · 9 km deep · 41 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80284944. Read Sat, Oct 3, 2026, 3:10 PM UTC.