QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

12 km E of Paradise, Montana

· 3.1 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mineral County 44 kmLake County 50 kmSanders County 57 kmMissoula County 70 kmShoshone County 94 kmFlathead County 110 kmClearwater County 111 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 1.8 (ml)
Depth
3.1 km below the surface
Felt
no reports yet
Nearest
Mineral County, 44 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1840 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 47.3903, -114.6422. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mineral County, MT 44 km (28 mi) NE of here earthquakes near Mineral County
Lake County, MT 50 km (31 mi) WSW of here earthquakes near Lake County
Sanders County, MT 57 km (36 mi) SE of here earthquakes near Sanders County
Missoula County, MT 70 km (43 mi) NW of here earthquakes near Missoula County
Shoshone County, ID 94 km (58 mi) E of here earthquakes near Shoshone County
Flathead County, MT 110 km (68 mi) SSW of here earthquakes near Flathead County

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

Aftershocks so far

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

  1. 1.9 2 km NNE of Alberton, Montana
  2. 1.9 3 km SSW of Alberton, Montana
  3. 1.7 2 km ENE of Alberton, Montana
  4. 2.2 2 km NE of Alberton, Montana
  5. 1.7 4 km SSW of Alberton, Montana
  6. 2.1 3 km S of Alberton, Montana
  7. 2.1 5 km WNW of Saint Ignatius, Montana
  8. 2.2 1 km SE of Alberton, Montana
  9. 1.6 16 km WSW of Kerr, Montana
  10. 2.0 17 km W of Niarada, Montana
  11. 1.6 4 km W of Ravalli, Montana
  12. 1.6 4 km NW of Niarada, Montana
  13. 1.8 6 km NNW of Plains, Montana
  14. 1.6 Western Montana
  15. 1.8 1 km SE of Alberton, 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.