QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

8 km NNW of Niarada, Montana

· 0.2 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sanders County 41 kmLake County 50 kmFlathead County 65 kmMineral County 89 kmLincoln County 96 kmShoshone County 109 kmMissoula 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
0.2 km below the surface
Felt
no reports yet
Nearest
Sanders County, 41 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2132 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 19 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 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 47.8780, -114.6583. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sanders County, MT 41 km (26 mi) ENE of here earthquakes near Sanders County
Lake County, MT 50 km (31 mi) WNW of here earthquakes near Lake County
Flathead County, MT 65 km (40 mi) SW of here earthquakes near Flathead County
Mineral County, MT 89 km (55 mi) NNE of here earthquakes near Mineral County
Lincoln County, MT 96 km (60 mi) SE of here earthquakes near Lincoln County
Shoshone County, ID 109 km (68 mi) ENE of here earthquakes near Shoshone County

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

Aftershocks so far

33 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. 1.6 1 km SSW of Dayton, Montana
  5. 1.6 6 km SW of Woods Bay, Montana
  6. 2.1 6 km SW of Woods Bay, Montana
  7. 1.6 6 km SW of Woods Bay, Montana
  8. 2.2 7 km WNW of Lake Mary Ronan, Montana
  9. 1.7 7 km WNW of Lake Mary Ronan, Montana
  10. 1.8 6 km WNW of Lake Mary Ronan, Montana
  11. 1.7 21 km SSE of Happys Inn, Montana
  12. 1.6 16 km WSW of Kerr, Montana
  13. 2.0 17 km W of Niarada, Montana
  14. 1.8 3 km NW of Happys Inn, Montana
  15. 1.7 5 km ESE of Lakeside, 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.