QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

6 km S of Happys Inn, Montana

· 11 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sanders County 30 kmLincoln County 63 kmFlathead County 87 kmLake County 90 kmShoshone County 93 kmMineral County 100 kmBonner 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 1.7 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Sanders County, 30 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2053 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× the energy of this one
  4. This earthquake M 1.7 about 11 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 48.0242, -115.1525. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sanders County, MT 30 km (19 mi) N of here earthquakes near Sanders County
Lincoln County, MT 63 km (39 mi) SSE of here earthquakes near Lincoln County
Flathead County, MT 87 km (54 mi) WSW of here earthquakes near Flathead County
Lake County, MT 90 km (56 mi) WNW of here earthquakes near Lake County
Shoshone County, ID 93 km (58 mi) NE of here earthquakes near Shoshone County
Mineral County, MT 100 km (62 mi) N of here earthquakes near Mineral County

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

Aftershocks so far

14 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. 1.7 21 km SSE of Happys Inn, Montana
  5. 2.4 23 km ENE of Noxon, Montana
  6. 2.0 17 km W of Niarada, Montana
  7. 1.8 3 km NW of Happys Inn, Montana
  8. 1.6 4 km NW of Niarada, Montana
  9. 2.6 4 km NW of Happys Inn, Montana
  10. 1.8 17 km WNW of Niarada, Montana
  11. 2.2 16 km ENE of Happys Inn, Montana
  12. 2.2 8 km WNW of Niarada, Montana
  13. 1.6 13 km WNW of Marion, Montana
  14. 1.7 18 km NW of Marion, 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.