Idaho earthquakes

M3.3 earthquake 17 km SSE of Challis, Idaho

A magnitude 3.3 earthquake struck 17 km SSE of Challis, Idaho on Wed, Apr 18, 1984, 6:58 PM MST (01:58 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.4 21 km E of Clayton, 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
3.3 (ml), minor
Local time
UTC
1984-04-19 01:58:49 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
44.363° N, 114.137° 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: 5 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 3.018 km NW of Challis, Idaho · 15495 days ago · 10 km deep · 35 km away
  2. 3.331 km NW of Mackay, Idaho · 15492 days ago · 10 km deep · 33 km away
  3. 3.421 km E of Clayton, Idaho · 15486 days ago · 10 km deep · 13 km away
  4. 3.222 km ENE of Clayton, Idaho · 15469 days ago · 10 km deep · 7 km away
  5. 3.521 km E of Clayton, Idaho · 15455 days ago · 10 km deep · 11 km away

Before

  1. 4.020 km SSE of Challis, Idaho · 15497 days ago · 10 km deep · 4 km away
  2. 3.130 km NNW of Challis, Idaho · 15502 days ago · 10 km deep · 48 km away
  3. 3.029 km NNW of Challis, Idaho · 15502 days ago · 10 km deep · 47 km away
  4. 3.316 km E of Clayton, Idaho · 15502 days ago · 10 km deep · 10 km away
  5. 3.010 km ENE of Clayton, Idaho · 15503 days ago · 10 km deep · 14 km away
  6. 3.735 km NNW of Challis, Idaho · 15504 days ago · 10 km deep · 53 km away
  7. 3.49 km ENE of Clayton, Idaho · 15504 days ago · 10 km deep · 15 km away
  8. 3.23 km ENE of Clayton, Idaho · 15505 days ago · 10 km deep · 21 km away
  9. 3.117 km NNW of Challis, Idaho · 15505 days ago · 10 km deep · 35 km away
  10. 3.020 km ESE of Clayton, Idaho · 15512 days ago · 10 km deep · 18 km away
  11. 3.19 km WNW of Clayton, Idaho · 15513 days ago · 10 km deep · 30 km away
  12. 3.428 km NNW of Challis, Idaho · 15514 days ago · 10 km deep · 46 km away
  13. 3.927 km NNW of Challis, Idaho · 15514 days ago · 10 km deep · 45 km away
  14. 3.226 km NNW of Challis, Idaho · 15514 days ago · 10 km deep · 44 km away
  15. 3.326 km NNW of Challis, Idaho · 15515 days ago · 10 km deep · 44 km away
  16. 3.321 km SSE of Challis, Idaho · 15515 days ago · 10 km deep · 4 km away
  17. 3.39 km SSE of Challis, Idaho · 15516 days ago · 10 km deep · 8 km away
  18. 3.231 km NW of Challis, Idaho · 15517 days ago · 10 km deep · 48 km away
  19. 3.628 km NNW of Challis, Idaho · 15521 days ago · 10 km deep · 46 km away
  20. 3.231 km NW of Challis, Idaho · 15522 days ago · 10 km deep · 49 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00023nu. Read Tue, Sep 22, 2026, 12:20 PM UTC.