QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

26 km SSE of Cooke City, Montana

· 15 km deep · released about 6.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Park County 38 kmCarbon County 73 kmPark County 95 kmStillwater County 99 kmTeton County 100 kmSweet Grass County 112 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 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Park County, 38 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2007 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 6.8 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 2,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.8 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 44.8113, -109.7538. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Park County, WY 38 km (23 mi) NNW of here earthquakes near Park County
Carbon County, MT 73 km (45 mi) SW of here earthquakes near Carbon County
Park County, MT 95 km (59 mi) SE of here earthquakes near Park County
Stillwater County, MT 99 km (61 mi) SSW of here earthquakes near Stillwater County
Teton County, WY 100 km (62 mi) NNE of here earthquakes near Teton County
Sweet Grass County, MT 112 km (70 mi) S of here earthquakes near Sweet Grass County

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

Aftershocks so far

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

  1. 1.8 37 km S of Silver Gate, Montana
  2. 1.6 37 km S of Silver Gate, Montana
  3. 1.8 48 km S of Silver Gate, Montana
  4. 1.6 36 km S of Silver Gate, Montana
  5. 1.7 38 km S of Silver Gate, Montana
  6. 2.0 35 km S of Silver Gate, Montana
  7. 1.9 38 km S of Silver Gate, Montana
  8. 1.8 38 km SSW of Silver Gate, Montana
  9. 1.7 10 km NNE of Cooke City, Montana
  10. 1.8 36 km S of Silver Gate, Montana
  11. 1.8 40 km SW of Silver Gate, Montana
  12. 2.0 36 km S of Silver Gate, Montana
  13. 1.7 39 km S of Silver Gate, Montana
  14. 1.6 37 km S of Silver Gate, Montana
  15. 2.3 37 km S of Silver Gate, 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.