Montana earthquakes

M2.5 earthquake 18 km NE of Leadore, Idaho

A magnitude 2.5 earthquake struck 18 km NE of Leadore, Idaho on Fri, Apr 3, 2015, 10:56 AM MDT (16:56 UTC), 12 km (8 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

A larger quake followed: M3.3 12 km SE of Challis, Idaho. This one was a foreshock.

Dillon forecastMore in Montana

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.5 (mc), micro
Local time
UTC
2015-04-03 16:56:18 UTC
Depth
12.4 km (7.7 mi), shallow
Epicenter
44.774° N, 113.167° W
Region
Montana
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 0.4 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.50
Station coverage gap
83°
Stations used
42

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 2.110 km SE of Challis, Idaho · 4196 days ago · 12 km deep · 86 km away
  2. 1.623 km SW of Leadore, Idaho · 4190 days ago · 13 km deep · 42 km away
  3. 2.67 km SE of Challis, Idaho · 4180 days ago · 12 km deep · 86 km away
  4. 1.923 km SW of Leadore, Idaho · 4174 days ago · 11 km deep · 42 km away
  5. 2.89 km NW of Challis, Idaho · 4173 days ago · 8 km deep · 93 km away · felt by 2
  6. 2.312 km NW of Challis, Idaho · 4173 days ago · 5 km deep · 95 km away
  7. 2.69 km NW of Challis, Idaho · 4173 days ago · 7 km deep · 93 km away · felt by 3
  8. 2.69 km NW of Challis, Idaho · 4173 days ago · 6 km deep · 93 km away
  9. 2.011 km SE of Challis, Idaho · 4171 days ago · 9 km deep · 86 km away
  10. 2.519 km ENE of Lima, Montana · 4166 days ago · 6 km deep · 65 km away
  11. 2.99 km NW of Challis, Idaho · 4165 days ago · 7 km deep · 93 km away
  12. 3.312 km SE of Challis, Idaho · 4153 days ago · 6 km deep · 84 km away · felt by 2
  13. 1.926 km SW of Lima, Montana · 4149 days ago · 11 km deep · 48 km away
  14. 1.828 km SW of Lima, Montana · 4149 days ago · 12 km deep · 44 km away
  15. 2.012 km SE of Challis, Idaho · 4146 days ago · 10 km deep · 84 km away
  16. 1.98 km NW of Challis, Idaho · 4145 days ago · 8 km deep · 92 km away
  17. 2.311 km ESE of Challis, Idaho · 4144 days ago · 12 km deep · 83 km away
  18. 1.540 km ESE of Salmon, Idaho · 4139 days ago · 10 km deep · 40 km away

Before

  1. 2.08 km SE of Challis, Idaho · 4199 days ago · 12 km deep · 87 km away
  2. 2.115 km NNW of Challis, Idaho · 4203 days ago · 4 km deep · 94 km away
  3. 2.012 km N of Challis, Idaho · 4203 days ago · 11 km deep · 86 km away
  4. 2.335 km SE of Wisdom, Montana · 4203 days ago · 8 km deep · 74 km away
  5. 2.09 km SE of Challis, Idaho · 4210 days ago · 12 km deep · 86 km away
  6. 2.314 km NW of Challis, Idaho · 4212 days ago · 5 km deep · 94 km away
  7. 2.511 km SE of Challis, Idaho · 4220 days ago · 11 km deep · 85 km away
  8. 1.910 km SE of Challis, Idaho · 4220 days ago · 13 km deep · 85 km away
  9. 1.615 km NE of Dillon, Montana · 4224 days ago · 8 km deep · 80 km away
  10. 3.111 km SE of Challis, Idaho · 4225 days ago · 11 km deep · 84 km away
  11. 2.810 km SE of Challis, Idaho · 4227 days ago · 12 km deep · 86 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb15881858. Read Wed, Sep 30, 2026, 9:29 AM UTC.