QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

20 km ENE of Trout Creek, Montana

· 3.5 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sanders County 20 kmLincoln County 73 kmShoshone County 74 kmMineral County 88 kmLake County 98 kmKootenai County 104 kmFlathead County 105 kmBonner County 106 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
3.5 km below the surface
Felt
no reports yet
Nearest
Sanders County, 20 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2282 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 12 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 47.9023, -115.3430. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sanders County, MT 20 km (13 mi) NW of here earthquakes near Sanders County
Lincoln County, MT 73 km (45 mi) S of here earthquakes near Lincoln County
Shoshone County, ID 74 km (46 mi) NNE of here earthquakes near Shoshone County
Mineral County, MT 88 km (55 mi) NNW of here earthquakes near Mineral County
Lake County, MT 98 km (61 mi) WNW of here earthquakes near Lake County
Kootenai County, ID 104 km (65 mi) ENE of here earthquakes near Kootenai County

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

Aftershocks so far

15 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. 2.6 4 km NW of Happys Inn, Montana
  9. 1.8 17 km WNW of Niarada, Montana
  10. 2.2 16 km ENE of Happys Inn, Montana
  11. 1.6 13 km WNW of Marion, Montana
  12. 1.7 18 km NW of Marion, Montana
  13. 1.7 6 km S of Happys Inn, Montana
  14. 2.1 22 km NNE of Trout Creek, Montana
  15. 1.7 2 km NNW of Happys Inn, 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.