M3.7 earthquake 10 km SSE of Challis, Idaho
A magnitude 3.7 earthquake struck 10 km SSE of Challis, Idaho on Wed, Feb 6, 1985, 7:14 PM MST (02:14 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.5 6 km NE of Challis, Idaho. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.7 (ml), minor
- Local time
- UTC
- 1985-02-07 02:14:04 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 44.421° N, 114.185° 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
- 3.014 km NNW of Clayton, Idaho · 15205 days ago · 5 km deep · 25 km away
- 3.85 km S of Challis, Idaho · 15205 days ago · 10 km deep · 6 km away
- 3.219 km NNW of Leadore, Idaho · 15204 days ago · 5 km deep · 78 km away
- 3.023 km S of Leadore, Idaho · 15197 days ago · 5 km deep · 64 km away
- 3.33 km E of Challis, Idaho · 15191 days ago · 10 km deep · 9 km away
- 3.14 km SE of Challis, Idaho · 15189 days ago · 10 km deep · 7 km away
- 4.56 km NE of Challis, Idaho · 15171 days ago · 10 km deep · 15 km away
- 3.18 km SSE of Clayton, Idaho · 15166 days ago · 10 km deep · 30 km away
- 3.539 km ESE of Challis, Idaho · 15165 days ago · 5 km deep · 33 km away
- 3.441 km ESE of Challis, Idaho · 15165 days ago · 5 km deep · 34 km away
- 3.126 km NW of Clayton, Idaho · 15163 days ago · 10 km deep · 35 km away
- 3.130 km NW of Mackay, Idaho · 15157 days ago · 5 km deep · 42 km away
Before
- 4.76 km NE of Challis, Idaho · 15210 days ago · 10 km deep · 14 km away
- 3.410 km N of Clayton, Idaho · 15210 days ago · 10 km deep · 20 km away
- 3.88 km WSW of Challis, Idaho · 15210 days ago · 10 km deep · 14 km away
- 3.722 km NNE of Challis, Idaho · 15229 days ago · 10 km deep · 31 km away
- 3.415 km N of Challis, Idaho · 15234 days ago · 10 km deep · 24 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002bpk. Read Tue, Sep 29, 2026, 7:24 AM UTC.