QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

5 km NW of Bigfork, Montana

· 10 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Flathead County 22 kmLake County 51 kmSanders County 87 kmGlacier County 108 kmLincoln 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 3.0 (ml)
Depth
10 km below the surface
Felt
45 reports · strongest reported intensity III
Nearest
Flathead County, 22 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1561 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 45 people have reported feeling it to USGS.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 48.0996, -114.1276. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Flathead County, MT 22 km (14 mi) SSW of here earthquakes near Flathead County
Lake County, MT 51 km (32 mi) N of here earthquakes near Lake County
Sanders County, MT 87 km (54 mi) ENE of here earthquakes near Sanders County
Glacier County, MT 108 km (67 mi) SW of here earthquakes near Glacier County
Lincoln County, MT 111 km (69 mi) ESE of here earthquakes near Lincoln County
Missoula County, MT 121 km (75 mi) N of here earthquakes near Missoula County

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

Aftershocks so far

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

  1. 1.6 3 km NNE of Somers, Montana
  2. 2.0 1 km ENE of Columbia Falls, Montana
  3. 1.6 Western Montana
  4. 2.1 8 km NNW of Bigfork, Montana
  5. 1.7 11 km NW of Batavia, Montana
  6. 2.9 4 km N of Elmo, Montana
  7. 1.7 Western Montana
  8. 1.6 12 km NNW of Batavia, Montana
  9. 2.5 6 km WNW of Bear Dance, Montana
  10. 1.6 4 km ESE of Rollins, Montana
  11. 2.3 19 km SSE of Swan Lake, Montana
  12. 2.1 16 km NNE of Swan Lake, Montana
  13. 2.1 10 km SW of Whitefish, Montana
  14. 1.7 3 km E of Forest Hill Village, Montana
  15. 1.6 13 km E of Martin City, 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.