Idaho earthquakes

M3.8 earthquake 29 km NNW of Challis, Idaho

A magnitude 3.8 earthquake struck 29 km NNW of Challis, Idaho on Wed, Mar 21, 1984, 2:43 PM MST (21:43 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.2 30 km NNW 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
3.8 (ml), minor
Local time
UTC
1984-03-21 21:43:36 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
44.730° N, 114.438° 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.

Depth from
OPERATOR_ASSIGNED

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 37 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 3.231 km NW of Challis, Idaho · 15524 days ago · 10 km deep · 8 km away
  2. 4.230 km NNW of Challis, Idaho · 15523 days ago · 10 km deep · 1 km away
  3. 3.028 km NNW of Challis, Idaho · 15523 days ago · 10 km deep · 5 km away
  4. 3.226 km NW of Challis, Idaho · 15523 days ago · 10 km deep · 7 km away
  5. 4.030 km NW of Challis, Idaho · 15523 days ago · 10 km deep · 2 km away
  6. 3.327 km NNW of Challis, Idaho · 15523 days ago · 10 km deep · 2 km away
  7. 3.631 km NW of Challis, Idaho · 15523 days ago · 10 km deep · 9 km away
  8. 3.137 km WNW of Challis, Idaho · 15522 days ago · 10 km deep · 21 km away
  9. 3.429 km NW of Challis, Idaho · 15522 days ago · 10 km deep · 1 km away
  10. 3.528 km NW of Challis, Idaho · 15522 days ago · 10 km deep · 3 km away
  11. 3.518 km SE of Challis, Idaho · 15522 days ago · 10 km deep · 48 km away
  12. 3.8southern Idaho · 15522 days ago · 10 km deep · 0 km away
  13. 3.231 km NW of Challis, Idaho · 15522 days ago · 10 km deep · 6 km away
  14. 3.628 km NNW of Challis, Idaho · 15521 days ago · 10 km deep · 2 km away
  15. 3.231 km NW of Challis, Idaho · 15517 days ago · 10 km deep · 6 km away
  16. 3.39 km SSE of Challis, Idaho · 15516 days ago · 10 km deep · 39 km away
  17. 3.321 km SSE of Challis, Idaho · 15516 days ago · 10 km deep · 51 km away
  18. 3.326 km NNW of Challis, Idaho · 15515 days ago · 10 km deep · 6 km away
  19. 3.226 km NNW of Challis, Idaho · 15515 days ago · 10 km deep · 3 km away
  20. 3.927 km NNW of Challis, Idaho · 15515 days ago · 10 km deep · 5 km away
  21. 3.428 km NNW of Challis, Idaho · 15515 days ago · 10 km deep · 5 km away
  22. 3.19 km WNW of Clayton, Idaho · 15513 days ago · 10 km deep · 48 km away
  23. 3.020 km ESE of Clayton, Idaho · 15513 days ago · 10 km deep · 63 km away
  24. 3.117 km NNW of Challis, Idaho · 15506 days ago · 10 km deep · 13 km away
  25. 3.23 km ENE of Clayton, Idaho · 15505 days ago · 10 km deep · 51 km away
  26. 3.49 km ENE of Clayton, Idaho · 15505 days ago · 10 km deep · 49 km away
  27. 3.735 km NNW of Challis, Idaho · 15504 days ago · 10 km deep · 5 km away
  28. 3.010 km ENE of Clayton, Idaho · 15504 days ago · 10 km deep · 50 km away
  29. 3.316 km E of Clayton, Idaho · 15503 days ago · 10 km deep · 54 km away
  30. 3.029 km NNW of Challis, Idaho · 15503 days ago · 10 km deep · 1 km away
  31. 3.130 km NNW of Challis, Idaho · 15502 days ago · 10 km deep · 2 km away
  32. 4.020 km SSE of Challis, Idaho · 15498 days ago · 10 km deep · 51 km away
  33. 3.317 km SSE of Challis, Idaho · 15497 days ago · 10 km deep · 47 km away
  34. 3.018 km NW of Challis, Idaho · 15495 days ago · 10 km deep · 14 km away
  35. 3.331 km NW of Mackay, Idaho · 15493 days ago · 10 km deep · 80 km away
  36. 3.421 km E of Clayton, Idaho · 15487 days ago · 10 km deep · 59 km away
  37. 3.222 km ENE of Clayton, Idaho · 15469 days ago · 10 km deep · 54 km away

Before

  1. 3.220 km E of Clayton, Idaho · 15530 days ago · 10 km deep · 57 km away
  2. 3.212 km WNW of Clayton, Idaho · 15530 days ago · 10 km deep · 48 km away
  3. 3.211 km NE of Clayton, Idaho · 15535 days ago · 10 km deep · 44 km away
  4. 3.435 km ESE of Clayton, Idaho · 15537 days ago · 10 km deep · 74 km away
  5. 3.324 km E of Clayton, Idaho · 15538 days ago · 10 km deep · 55 km away
  6. 3.326 km SE of Challis, Idaho · 15538 days ago · 5 km deep · 56 km away
  7. 3.08 km N of Clayton, Idaho · 15539 days ago · 10 km deep · 44 km away
  8. 3.017 km NW of Clayton, Idaho · 15540 days ago · 10 km deep · 44 km away
  9. 3.38 km SSW of Clayton, Idaho · 15540 days ago · 10 km deep · 59 km away
  10. 3.019 km ENE of Clayton, Idaho · 15545 days ago · 10 km deep · 50 km away
  11. 4.517 km SSE of Challis, Idaho · 15545 days ago · 10 km deep · 47 km away
  12. 3.032 km E of Clayton, Idaho · 15548 days ago · 10 km deep · 66 km away
  13. 3.425 km ESE of Clayton, Idaho · 15550 days ago · 10 km deep · 65 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00022v9. Read Tue, Sep 22, 2026, 10:35 PM UTC.