QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

49 km SE of West Yellowstone, Montana

· 1.8 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 41 kmFremont County 72 kmPark County 81 kmTeton County 85 kmMadison County 107 kmPark County 119 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 2.1 (ml)
Depth
1.8 km below the surface
Felt
no reports yet
Nearest
Teton County, 41 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2701 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 44.3947, -110.6107. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, WY 41 km (26 mi) NNW of here earthquakes near Teton County
Fremont County, ID 72 km (45 mi) ENE of here earthquakes near Fremont County
Park County, WY 81 km (51 mi) W of here earthquakes near Park County
Teton County, ID 85 km (53 mi) NE of here earthquakes near Teton County
Madison County, ID 107 km (67 mi) NE of here earthquakes near Madison County
Park County, MT 119 km (74 mi) S of here earthquakes near Park County

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

Aftershocks so far

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

  1. 1.8 56 km NNE of Kelly, Wyoming
  2. 3.5 59 km NNE of Kelly, Wyoming
  3. 2.0 49 km NNE of Kelly, Wyoming
  4. 1.7 56 km SSW of Silver Gate, Montana
  5. 1.7 7 km NE of West Yellowstone, Montana
  6. 1.5 32 km E of West Yellowstone, Montana
  7. 1.6 32 km E of West Yellowstone, Montana
  8. 2.0 32 km E of West Yellowstone, Montana
  9. 1.9 21 km SSE of Mammoth, Wyoming
  10. 1.6 49 km SE of West Yellowstone, Montana
  11. 1.8 30 km ESE of Island Park, Idaho
  12. 1.6 28 km ESE of West Yellowstone, Montana
  13. 1.7 29 km ESE of West Yellowstone, Montana
  14. 1.7 Wyoming
  15. 2.4 28 km ESE of West Yellowstone, 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.