Idaho earthquakes

M3.4 earthquake 41 km ESE of Challis, Idaho

A magnitude 3.4 earthquake struck 41 km ESE of Challis, Idaho on Sat, Mar 23, 1985, 11:10 AM MST (18:10 UTC), 5 km (3 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
3.4 (ml), minor
Local time
UTC
1985-03-23 18:10:19 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
44.304° N, 113.796° 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: 12 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 3.126 km NW of Clayton, Idaho · 15157 days ago · 10 km deep · 67 km away
  2. 3.130 km NW of Mackay, Idaho · 15150 days ago · 5 km deep · 20 km away
  3. 3.214 km ENE of Clayton, Idaho · 15141 days ago · 10 km deep · 34 km away
  4. 3.031 km WNW of Lima, Montana · 15141 days ago · 5 km deep · 86 km away
  5. 3.030 km WNW of Mackay, Idaho · 15136 days ago · 5 km deep · 39 km away
  6. 3.3Idaho-Montana border region · 15134 days ago · 10 km deep · 28 km away
  7. 3.34 km SW of Challis, Idaho · 15131 days ago · 10 km deep · 42 km away
  8. 3.15 km SW of Challis, Idaho · 15114 days ago · 5 km deep · 42 km away
  9. 3.023 km S of Clayton, Idaho · 15111 days ago · 5 km deep · 54 km away
  10. 3.113 km NE of Challis, Idaho · 15110 days ago · 5 km deep · 41 km away
  11. 3.225 km NW of Mackay, Idaho · 15108 days ago · 5 km deep · 29 km away
  12. 3.012 km NNW of Clayton, Idaho · 15108 days ago · 5 km deep · 54 km away

Before

  1. 3.539 km ESE of Challis, Idaho · 15158 days ago · 5 km deep · 6 km away
  2. 3.18 km SSE of Clayton, Idaho · 15159 days ago · 10 km deep · 47 km away
  3. 4.56 km NE of Challis, Idaho · 15165 days ago · 10 km deep · 41 km away
  4. 3.14 km SE of Challis, Idaho · 15183 days ago · 10 km deep · 37 km away
  5. 3.33 km E of Challis, Idaho · 15185 days ago · 10 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002d59. Read Tue, Sep 22, 2026, 11:27 PM UTC.