Idaho earthquakes

M3.1 earthquake 8 km SSE of Clayton, Idaho

A magnitude 3.1 earthquake struck 8 km SSE of Clayton, Idaho on Fri, Mar 22, 1985, 11:07 AM MST (18:07 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.5 39 km ESE 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
3.1 (ml), minor
Local time
UTC
1985-03-22 18:07:51 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
44.187° N, 114.368° 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: 13 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 3.539 km ESE of Challis, Idaho · 15165 days ago · 5 km deep · 51 km away
  2. 3.441 km ESE of Challis, Idaho · 15165 days ago · 5 km deep · 47 km away
  3. 3.126 km NW of Clayton, Idaho · 15164 days ago · 10 km deep · 35 km away
  4. 3.130 km NW of Mackay, Idaho · 15158 days ago · 5 km deep · 42 km away
  5. 3.214 km ENE of Clayton, Idaho · 15148 days ago · 10 km deep · 17 km away
  6. 3.030 km WNW of Mackay, Idaho · 15143 days ago · 5 km deep · 39 km away
  7. 3.3Idaho-Montana border region · 15141 days ago · 10 km deep · 70 km away
  8. 3.34 km SW of Challis, Idaho · 15138 days ago · 10 km deep · 33 km away
  9. 3.15 km SW of Challis, Idaho · 15121 days ago · 5 km deep · 32 km away
  10. 3.023 km S of Clayton, Idaho · 15119 days ago · 5 km deep · 16 km away
  11. 3.113 km NE of Challis, Idaho · 15117 days ago · 5 km deep · 50 km away
  12. 3.225 km NW of Mackay, Idaho · 15115 days ago · 5 km deep · 42 km away
  13. 3.012 km NNW of Clayton, Idaho · 15115 days ago · 5 km deep · 21 km away

Before

  1. 4.56 km NE of Challis, Idaho · 15172 days ago · 10 km deep · 43 km away
  2. 3.14 km SE of Challis, Idaho · 15190 days ago · 10 km deep · 36 km away
  3. 3.33 km E of Challis, Idaho · 15192 days ago · 10 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002d4a. Read Wed, Sep 30, 2026, 5:10 AM UTC.