QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

24 km NNE of Lima, Montana

· 0.8 km deep · released about 52 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Beaverhead County 44 kmClark County 63 kmMadison County 71 kmFremont County 107 kmLemhi County 109 kmJefferson County 117 kmSilver Bow County 118 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 2.2 (ml)
Depth
0.8 km below the surface
Felt
no reports yet
Nearest
Beaverhead County, 44 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3195 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 52 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 44.8448, -112.5070. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Beaverhead County, MT 44 km (27 mi) SE of here earthquakes near Beaverhead County
Clark County, ID 63 km (39 mi) N of here earthquakes near Clark County
Madison County, MT 71 km (44 mi) SW of here earthquakes near Madison County
Fremont County, ID 107 km (66 mi) NW of here earthquakes near Fremont County
Lemhi County, ID 109 km (68 mi) E of here earthquakes near Lemhi County
Jefferson County, ID 117 km (73 mi) N of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.6 23 km NW of Lima, Montana
  2. 1.5 29 km NE of Lima, Montana
  3. 1.6 16 km WSW of Lima, Montana
  4. 2.1 8 km E of Lima, Montana
  5. 1.6 30 km SE of Dillon, Montana
  6. 1.6 29 km NNE of Spencer, Idaho
  7. 1.9 29 km SW of Dillon, Montana
  8. 1.6 29 km SW of Dillon, Montana
  9. 1.8 18 km S of Lima, Montana
  10. 1.9 26 km NNW of Lima, Montana
  11. 2.2 10 km NE of Lima, Montana
  12. 2.4 33 km NNE of Spencer, Idaho
  13. 2.4 32 km ENE of Leadore, Idaho
  14. 2.2 5 km ENE of Lima, Montana
  15. 2.4 10 km NE of Lima, 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.