M1.8 earthquake 28 km SW of Lima, Montana
A magnitude 1.8 earthquake struck 28 km SW of Lima, Montana on Fri, May 22, 2015, 2:02 AM MDT (08:02 UTC), 12 km (7 mi) below the surface.
Automatic solution: the magnitude and location may still be revised.
A larger quake followed: M3.2 14 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
- 1.8 (mc), micro
- Local time
- UTC
- 2015-05-22 08:02:22 UTC
- Depth
- 12.0 km (7.5 mi), shallow
- Epicenter
- 44.455° N, 112.841° W
- Region
- Idaho
- Tsunami flag
- No
- Status
- Automatic solution, may be revised
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
An automatic solution; a seismologist may revise it.
- Location uncertainty
- About 1.4 km horizontally, 1.8 km in depth
- Magnitude uncertainty
- ±0.50
- Station coverage gap
- 108°
- Stations used
- 14
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
- 1.540 km ESE of Salmon, Idaho · 4131 days ago · 10 km deep · 84 km away
- 3.214 km SE of Challis, Idaho · 4125 days ago · 5 km deep · 98 km away
- 1.635 km SSE of Salmon, Idaho · 4124 days ago · 10 km deep · 86 km away
- 1.79 km WNW of Dillon, Montana · 4120 days ago · 10 km deep · 90 km away
- 1.528 km ENE of Leadore, Idaho · 4112 days ago · 13 km deep · 37 km away
- 2.029 km N of Spencer, Idaho · 4104 days ago · 11 km deep · 61 km away
- 1.750 km W of Hebgen Lake Estates, Montana · 4099 days ago · 0 km deep · 90 km away
- 2.148 km W of Hebgen Lake Estates, Montana · 4099 days ago · 7 km deep · 91 km away
- 1.624 km NNE of Spencer, Idaho · 4098 days ago · 9 km deep · 60 km away
- 1.541 km S of Virginia City, Montana · 4094 days ago · 10 km deep · 82 km away
- 1.919 km NW of Lima, Montana · 4091 days ago · 1 km deep · 35 km away
- 1.924 km ENE of Leadore, Idaho · 4086 days ago · 7 km deep · 37 km away
Before
- 1.926 km SW of Lima, Montana · 4142 days ago · 11 km deep · 5 km away
- 1.843 km NE of Spencer, Idaho · 4144 days ago · 9 km deep · 81 km away
- 1.643 km NE of Spencer, Idaho · 4148 days ago · 6 km deep · 81 km away
- 2.519 km ENE of Lima, Montana · 4159 days ago · 6 km deep · 46 km away
- 1.923 km SW of Leadore, Idaho · 4166 days ago · 11 km deep · 58 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event mb15542179. Read Tue, Sep 22, 2026, 8:50 PM UTC.