QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

13 km WNW of Marion, Montana

· 10 km deep · released about 7.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sanders County 53 kmFlathead County 59 kmLincoln County 64 kmLake County 80 kmMineral County 117 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 1.6 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Sanders County, 53 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1725 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 7.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.3 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 48.1642, -114.8190. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sanders County, MT 53 km (33 mi) NNE of here earthquakes near Sanders County
Flathead County, MT 59 km (36 mi) WSW of here earthquakes near Flathead County
Lincoln County, MT 64 km (40 mi) SE of here earthquakes near Lincoln County
Lake County, MT 80 km (50 mi) NW of here earthquakes near Lake County
Mineral County, MT 117 km (73 mi) N of here earthquakes near Mineral County
Shoshone County, ID 121 km (75 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

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

  1. 1.7 19 km SW of Marion, Montana
  2. 2.3 18 km SW of Marion, Montana
  3. 2.0 19 km SW of Marion, Montana
  4. 2.2 7 km WNW of Lake Mary Ronan, Montana
  5. 1.7 7 km WNW of Lake Mary Ronan, Montana
  6. 1.8 6 km WNW of Lake Mary Ronan, Montana
  7. 1.7 21 km SSE of Happys Inn, Montana
  8. 2.0 17 km W of Niarada, Montana
  9. 1.8 3 km NW of Happys Inn, Montana
  10. 1.6 4 km NW of Niarada, Montana
  11. 2.6 4 km NW of Happys Inn, Montana
  12. 1.8 17 km WNW of Niarada, Montana
  13. 1.7 11 km NW of Batavia, Montana
  14. 2.2 16 km ENE of Happys Inn, Montana
  15. 2.9 4 km N of Elmo, 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.