QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

6 km SSE of Seeley Lake, Montana

· 10 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Missoula County 35 kmPowell County 50 kmLake County 75 kmLewis and Clark County 81 kmGranite County 81 kmDeer Lodge County 117 kmTeton County 117 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 2.7 (ml)
Depth
10 km below the surface
Felt
6 reports · strongest reported intensity IV
Nearest
Missoula County, 35 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 611 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 47.1233, -113.4507. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Missoula County, MT 35 km (22 mi) ENE of here earthquakes near Missoula County
Powell County, MT 50 km (31 mi) NW of here earthquakes near Powell County
Lake County, MT 75 km (47 mi) SE of here earthquakes near Lake County
Lewis and Clark County, MT 81 km (50 mi) W of here earthquakes near Lewis and Clark County
Granite County, MT 81 km (50 mi) N of here earthquakes near Granite County
Deer Lodge County, MT 117 km (73 mi) NNW of here earthquakes near Deer Lodge County

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

Aftershocks so far

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

  1. 3.2 3 km NE of Seeley Lake, Montana
  2. 2.4 32 km ENE of Seeley Lake, Montana
  3. 2.6 31 km ENE of Seeley Lake, Montana
  4. 2.1 25 km ENE of Seeley Lake, Montana
  5. 1.9 15 km N of Seeley Lake, Montana
  6. 1.9 18 km E of Saint Ignatius, Montana
  7. 2.6 13 km ESE of Kicking Horse, Montana
  8. 3.1 27 km NE of Seeley Lake, Montana
  9. 1.5 40 km NE of Seeley Lake, Montana
  10. 2.2 40 km NE of Seeley Lake, Montana
  11. 2.9 22 km WSW of Ovando, Montana
  12. 2.3 34 km NE of Seeley Lake, Montana
  13. 1.8 20 km N of Ovando, Montana
  14. 2.4 10 km S of Ovando, Montana
  15. 2.2 43 km NNE of Ovando, 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.