QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

12 km E of Finley Point, Montana

· 19 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 16 kmFlathead County 65 kmMissoula County 77 kmSanders County 96 kmMineral 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 1.9 (ml)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Lake County, 16 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2257 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 47.7170, -113.8942. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, MT 16 km (10 mi) ENE of here earthquakes near Lake County
Flathead County, MT 65 km (41 mi) S of here earthquakes near Flathead County
Missoula County, MT 77 km (48 mi) N of here earthquakes near Missoula County
Sanders County, MT 96 km (60 mi) E of here earthquakes near Sanders County
Mineral County, MT 111 km (69 mi) NE of here earthquakes near Mineral County
Powell County, MT 121 km (75 mi) NW of here earthquakes near Powell County

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

Aftershocks so far

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

  1. 2.1 5 km WNW of Saint Ignatius, Montana
  2. 1.7 20 km E of Finley Point, Montana
  3. 1.6 20 km E of Finley Point, Montana
  4. 1.6 20 km E of Finley Point, Montana
  5. 2.1 20 km E of Finley Point, Montana
  6. 1.8 17 km E of Condon, Montana
  7. 1.7 19 km E of Finley Point, Montana
  8. 1.6 16 km NNE of Condon, Montana
  9. 1.6 6 km SW of Woods Bay, Montana
  10. 1.7 1 km S of Woods Bay, Montana
  11. 2.1 6 km SW of Woods Bay, Montana
  12. 1.6 6 km SW of Woods Bay, Montana
  13. 1.8 14 km WNW of Condon, Montana
  14. 1.6 16 km WSW of Kerr, Montana
  15. 1.5 5 km NE of Saint Ignatius, 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.