Idaho earthquakes

M3.1 earthquake 13 km NE of Challis, Idaho

A magnitude 3.1 earthquake struck 13 km NE of Challis, Idaho on Fri, May 10, 1985, 4:00 PM MDT (22:00 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.4 16 km E of Clayton, Idaho. This one was a foreshock.

Challis forecastMore in Idaho

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1985-05-10 22:00:58 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
44.599° N, 114.116° 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: 7 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 3.225 km NW of Mackay, Idaho · 15119 days ago · 5 km deep · 65 km away
  2. 3.012 km NNW of Clayton, Idaho · 15119 days ago · 5 km deep · 39 km away
  3. 3.125 km WNW of Lima, Montana · 15101 days ago · 5 km deep · 96 km away
  4. 3.416 km E of Clayton, Idaho · 15092 days ago · 10 km deep · 39 km away
  5. 3.01 km ESE of Challis, Idaho · 15089 days ago · 5 km deep · 14 km away
  6. 3.015 km S of Clayton, Idaho · 15074 days ago · 5 km deep · 58 km away
  7. 3.320 km ESE of Challis, Idaho · 15062 days ago · 5 km deep · 21 km away

Before

  1. 3.023 km S of Clayton, Idaho · 15122 days ago · 5 km deep · 65 km away
  2. 3.15 km SW of Challis, Idaho · 15125 days ago · 5 km deep · 19 km away
  3. 3.34 km SW of Challis, Idaho · 15142 days ago · 10 km deep · 19 km away
  4. 3.3Idaho-Montana border region · 15145 days ago · 10 km deep · 67 km away
  5. 3.030 km WNW of Mackay, Idaho · 15147 days ago · 5 km deep · 69 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002enr. Read Sat, Oct 3, 2026, 10:44 PM UTC.