M3.7 earthquake 19 km ESE of Challis, Idaho
A magnitude 3.7 earthquake struck 19 km ESE of Challis, Idaho on Fri, Oct 19, 1984, 1:35 AM MDT (07:35 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.9 12 km SE 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
- 1984-10-19 07:35:09 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 44.424° N, 114.021° 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 10 in the 30 days before it.
After
- 3.619 km SSE of Challis, Idaho · 15307 days ago · 10 km deep · 14 km away
- 3.912 km SE of Challis, Idaho · 15302 days ago · 10 km deep · 7 km away
- 3.617 km S of Challis, Idaho · 15288 days ago · 10 km deep · 17 km away
Before
- 3.524 km SSE of Challis, Idaho · 15320 days ago · 10 km deep · 13 km away
- 3.824 km E of Clayton, Idaho · 15328 days ago · 10 km deep · 17 km away
- 3.224 km SE of Challis, Idaho · 15329 days ago · 10 km deep · 10 km away
- 3.613 km SSE of Challis, Idaho · 15330 days ago · 10 km deep · 13 km away
- 3.345 km NNW of Stanley, Idaho · 15333 days ago · 10 km deep · 85 km away
- 3.01 km NNE of Challis, Idaho · 15336 days ago · 10 km deep · 19 km away
- 3.411 km SE of Challis, Idaho · 15339 days ago · 10 km deep · 10 km away
- 3.48 km S of Challis, Idaho · 15341 days ago · 10 km deep · 18 km away
- 3.631 km NW of Lima, Montana · 15341 days ago · 10 km deep · 99 km away
- 3.517 km ENE of Clayton, Idaho · 15343 days ago · 10 km deep · 18 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000289x. Read Tue, Sep 22, 2026, 12:20 PM UTC.