QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

25 km E of Trout Creek, Montana

· 10 km deep · released about 56 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sanders County 14 kmShoshone County 74 kmLincoln County 77 kmMineral County 84 kmLake County 92 kmFlathead County 102 kmKootenai County 109 kmBonner County 113 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
10 km below the surface
Felt
no reports yet
Nearest
Sanders County, 14 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3667 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 56 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 5.8 270,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 190,000× the energy of this one
  3. Around the size people start to feel M 3.0 17× the energy of this one
  4. This earthquake M 2.2 about 56 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 47.8707, -115.2665. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sanders County, MT 14 km (9 mi) NNW of here earthquakes near Sanders County
Shoshone County, ID 74 km (46 mi) NE of here earthquakes near Shoshone County
Lincoln County, MT 77 km (48 mi) S of here earthquakes near Lincoln County
Mineral County, MT 84 km (52 mi) N of here earthquakes near Mineral County
Lake County, MT 92 km (57 mi) WNW of here earthquakes near Lake County
Flathead County, MT 102 km (63 mi) WSW of here earthquakes near Flathead County

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

Aftershocks so far

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

  1. 2.6 4 km NW of Happys Inn, Montana
  2. 1.8 17 km WNW of Niarada, Montana
  3. 1.8 6 km NNW of Plains, Montana
  4. 2.2 16 km ENE of Happys Inn, Montana
  5. 1.6 13 km WNW of Marion, Montana
  6. 1.7 18 km NW of Marion, Montana
  7. 1.7 6 km S of Happys Inn, Montana
  8. 2.1 22 km NNE of Trout Creek, Montana
  9. 1.7 2 km NNW of Happys Inn, Montana
  10. 1.7 20 km ENE of Trout Creek, Montana
  11. 2.0 2 km W of Happys Inn, Montana
  12. 1.9 5 km ENE of Weeksville, Montana
  13. 1.6 17 km SW of Happys Inn, Montana
  14. 1.8 14 km SW of Thompson Falls, Montana
  15. 2.4 16 km WNW of Lonepine, 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.