M2.7 earthquake 15 km SSE of Challis, Idaho
A magnitude 2.7 earthquake struck 15 km SSE of Challis, Idaho on Sun, Feb 9, 1986, 12:03 AM MST (07:03 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M4.1 19 km SSE 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
- 2.7 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1986-02-09 07:03:48 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 44.391° N, 114.127° 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: 3 in the 60 days after this one and 5 in the 30 days before it.
After
- 3.713 km NNE of Challis, Idaho · 14830 days ago · 5 km deep · 27 km away
- 3.110 km S of Challis, Idaho · 14805 days ago · 5 km deep · 7 km away
- 4.119 km SSE of Challis, Idaho · 14790 days ago · 5 km deep · 7 km away
Before
- 2.819 km ESE of Clayton, Idaho · 14851 days ago · 5 km deep · 26 km away
- 3.319 km SE of Clayton, Idaho · 14859 days ago · 5 km deep · 28 km away
- 3.736 km ESE of Clayton, Idaho · 14859 days ago · 5 km deep · 27 km away
- 4.037 km NW of Mackay, Idaho · 14860 days ago · 5 km deep · 30 km away
- 3.16 km S of Challis, Idaho · 14872 days ago · 5 km deep · 10 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002quw. Read Sun, Oct 4, 2026, 5:17 PM UTC.