Idaho earthquakes

M4.5 earthquake 6 km NE of Challis, Idaho

A magnitude 4.5 earthquake struck 6 km NE of Challis, Idaho on Sat, Mar 16, 1985, 11:56 PM MST (06:56 UTC), 10 km (6 mi) below the surface.

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
4.5 (mb), light
Local time
UTC
1985-03-17 06:56:17 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
44.553° N, 114.182° 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: 14 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 3.18 km SSE of Clayton, Idaho · 15159 days ago · 10 km deep · 43 km away
  2. 3.539 km ESE of Challis, Idaho · 15158 days ago · 5 km deep · 39 km away
  3. 3.441 km ESE of Challis, Idaho · 15158 days ago · 5 km deep · 41 km away
  4. 3.126 km NW of Clayton, Idaho · 15156 days ago · 10 km deep · 37 km away
  5. 3.130 km NW of Mackay, Idaho · 15150 days ago · 5 km deep · 54 km away
  6. 3.214 km ENE of Clayton, Idaho · 15140 days ago · 10 km deep · 28 km away
  7. 3.030 km WNW of Mackay, Idaho · 15135 days ago · 5 km deep · 65 km away
  8. 3.3Idaho-Montana border region · 15133 days ago · 10 km deep · 68 km away
  9. 3.34 km SW of Challis, Idaho · 15130 days ago · 10 km deep · 11 km away
  10. 3.15 km SW of Challis, Idaho · 15113 days ago · 5 km deep · 12 km away
  11. 3.023 km S of Clayton, Idaho · 15111 days ago · 5 km deep · 58 km away
  12. 3.113 km NE of Challis, Idaho · 15109 days ago · 5 km deep · 7 km away
  13. 3.225 km NW of Mackay, Idaho · 15107 days ago · 5 km deep · 62 km away
  14. 3.012 km NNW of Clayton, Idaho · 15107 days ago · 5 km deep · 32 km away

Before

  1. 3.14 km SE of Challis, Idaho · 15182 days ago · 10 km deep · 8 km away
  2. 3.33 km E of Challis, Idaho · 15184 days ago · 10 km deep · 6 km away
  3. 3.023 km S of Leadore, Idaho · 15190 days ago · 5 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002cz0 (also filed as ushis3885). Read Tue, Sep 22, 2026, 8:20 AM UTC.