M3.0 earthquake 30 km WNW of Mackay, Idaho
A magnitude 3.0 earthquake struck 30 km WNW of Mackay, Idaho on Sun, Apr 14, 1985, 2:39 PM MST (21:39 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M3.3 Idaho-Montana border region. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.0 (ml), minor
- Local time
- UTC
- 1985-04-14 21:39:06 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 43.983° N, 113.977° 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: 9 in the 60 days after this one and 7 in the 30 days before it.
After
- 3.3Idaho-Montana border region · 15133 days ago · 10 km deep · 45 km away
- 3.34 km SW of Challis, Idaho · 15131 days ago · 10 km deep · 59 km away
- 3.15 km SW of Challis, Idaho · 15114 days ago · 5 km deep · 59 km away
- 3.023 km S of Clayton, Idaho · 15111 days ago · 5 km deep · 33 km away
- 3.113 km NE of Challis, Idaho · 15110 days ago · 5 km deep · 69 km away
- 3.225 km NW of Mackay, Idaho · 15107 days ago · 5 km deep · 11 km away
- 3.012 km NNW of Clayton, Idaho · 15107 days ago · 5 km deep · 58 km away
- 3.416 km E of Clayton, Idaho · 15081 days ago · 10 km deep · 35 km away
- 3.01 km ESE of Challis, Idaho · 15078 days ago · 5 km deep · 60 km away
Before
- 3.214 km ENE of Clayton, Idaho · 15141 days ago · 10 km deep · 41 km away
- 3.130 km NW of Mackay, Idaho · 15150 days ago · 5 km deep · 19 km away
- 3.126 km NW of Clayton, Idaho · 15156 days ago · 10 km deep · 72 km away
- 3.441 km ESE of Challis, Idaho · 15158 days ago · 5 km deep · 39 km away
- 3.539 km ESE of Challis, Idaho · 15158 days ago · 5 km deep · 45 km away
- 3.18 km SSE of Clayton, Idaho · 15159 days ago · 10 km deep · 39 km away
- 4.56 km NE of Challis, Idaho · 15165 days ago · 10 km deep · 65 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002dth. Read Tue, Sep 22, 2026, 6:55 PM UTC.