QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

10 km SW of Whitefish, Montana

· 16 km deep · released about 41 lb of TNT

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10 km30 km60 km120 km N Flathead County 30 kmLincoln County 78 kmLake County 84 kmSanders County 86 kmGlacier County 114 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 2.1 (ml)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Flathead County, 30 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1730 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 41 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 48.3572, -114.4497. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Flathead County, MT 30 km (19 mi) WNW of here earthquakes near Flathead County
Lincoln County, MT 78 km (48 mi) ESE of here earthquakes near Lincoln County
Lake County, MT 84 km (52 mi) NNW of here earthquakes near Lake County
Sanders County, MT 86 km (53 mi) NE of here earthquakes near Sanders County
Glacier County, MT 114 km (71 mi) WSW of here earthquakes near Glacier County
Shoshone County, ID 155 km (96 mi) NE of here earthquakes near Shoshone County

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

Aftershocks so far

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

  1. 2.3 18 km SW of Marion, Montana
  2. 2.0 5 km SSW of West Glacier, Montana
  3. 1.8 12 km NE of Forest Hill Village, Montana
  4. 1.9 12 km ESE of Evergreen, Montana
  5. 1.6 6 km SW of Woods Bay, Montana
  6. 1.6 6 km SW of Woods Bay, Montana
  7. 2.2 7 km WNW of Lake Mary Ronan, Montana
  8. 1.7 7 km WNW of Lake Mary Ronan, Montana
  9. 1.8 6 km WNW of Lake Mary Ronan, Montana
  10. 2.3 6 km NNE of Olney, Montana
  11. 1.7 15 km NNE of Bigfork, Montana
  12. 1.7 5 km ESE of Lakeside, Montana
  13. 1.6 3 km NNE of Somers, Montana
  14. 2.0 1 km ENE of Columbia Falls, Montana
  15. 1.6 Western 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.