QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

2 km ESE of Condon, Montana

· 10 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 33 kmMissoula County 57 kmFlathead County 90 kmPowell County 94 kmLewis and Clark County 108 kmTeton County 110 kmMineral County 114 kmSanders County 115 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 1.6 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Lake County, 33 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2704 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 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 47.5222, -113.6817. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, MT 33 km (21 mi) ESE of here earthquakes near Lake County
Missoula County, MT 57 km (36 mi) NNE of here earthquakes near Missoula County
Flathead County, MT 90 km (56 mi) SSE of here earthquakes near Flathead County
Powell County, MT 94 km (59 mi) NW of here earthquakes near Powell County
Lewis and Clark County, MT 108 km (67 mi) WNW of here earthquakes near Lewis and Clark County
Teton County, MT 110 km (68 mi) WSW of here earthquakes near Teton County

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

Aftershocks so far

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

  1. 2.0 8 km S of Condon, Montana
  2. 2.4 21 km ENE of Seeley Lake, Montana
  3. 1.9 21 km NNW of Condon, Montana
  4. 3.7 3 km NE of Ravalli, Montana
  5. 1.5 Western Montana
  6. 3.2 2 km ESE of Ravalli, Montana
  7. 2.3 26 km ESE of Condon, Montana
  8. 2.1 14 km N of Seeley Lake, Montana
  9. 1.7 Western Montana
  10. 1.9 1 km W of Charlo, Montana
  11. 2.3 19 km SSE of Swan Lake, Montana
  12. 1.5 11 km WNW of Condon, Montana
  13. 1.6 20 km E of Finley Point, Montana
  14. 1.5 10 km ENE of Condon, Montana
  15. 1.8 13 km E of Pablo, 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.