QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

41 km NE of Leadore, Idaho

· 5.0 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Beaverhead County 21 kmLemhi County 65 kmClark County 96 kmMadison County 98 kmSilver Bow County 106 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.6 (ml)
Depth
5.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Beaverhead County, 21 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1660 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 44.9889, -113.0684. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Beaverhead County, MT 21 km (13 mi) SW of here earthquakes near Beaverhead County
Lemhi County, ID 65 km (40 mi) E of here earthquakes near Lemhi County
Clark County, ID 96 km (60 mi) NW of here earthquakes near Clark County
Madison County, MT 98 km (61 mi) WSW of here earthquakes near Madison County
Silver Bow County, MT 106 km (66 mi) SSW of here earthquakes near Silver Bow County
Custer County, ID 123 km (76 mi) NE of here earthquakes near Custer County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

17 earthquakes have been recorded within 50 km since this one.

  1. 2.0 Western Montana
  2. 2.6 17 km SW of Dillon, Montana
  3. 1.6 Idaho-Montana border region
  4. 1.7 14 km NW of Lima, Montana
  5. 1.9 23 km SSE of Dillon, Montana
  6. 2.0 28 km WSW of Dillon, Montana
  7. 1.6 26 km NW of Lima, Montana
  8. 2.0 30 km W of Lima, Montana
  9. 2.0 33 km NNW of Lima, Montana
  10. 1.6 22 km WSW of Lima, Montana
  11. 2.4 21 km WSW of Lima, Montana
  12. 2.0 40 km SW of Dillon, Montana
  13. 1.8 39 km SW of Dillon, Montana
  14. 1.9 39 km SW of Dillon, Montana
  15. 1.6 39 km SW of Dillon, Montana

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.