QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

57 km SE of West Yellowstone, Montana

· 9.2 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 31 kmFremont County 74 kmPark County 80 kmTeton County 80 kmMadison County 105 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 (md)
Depth
9.2 km below the surface
Felt
no reports yet
Nearest
Teton County, 31 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2208 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 44.3102, -110.5663. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, WY 31 km (19 mi) NNW of here earthquakes near Teton County
Fremont County, ID 74 km (46 mi) E of here earthquakes near Fremont County
Park County, WY 80 km (50 mi) WSW of here earthquakes near Park County
Teton County, ID 80 km (50 mi) NE of here earthquakes near Teton County
Madison County, ID 105 km (65 mi) NE of here earthquakes near Madison County
Bonneville County, ID 132 km (82 mi) NE of here earthquakes near Bonneville County

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

Aftershocks so far

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

  1. 2.6 66 km SSE of Mammoth, Wyoming
  2. 1.9 66 km SSE of Mammoth, Wyoming
  3. 1.9 Wyoming
  4. 2.1 52.1 km WSW of Warm River, ID
  5. 1.9 52.0 km WSW of Warm River, ID
  6. 1.5 34 km ESE of West Yellowstone, Montana
  7. 1.5 34 km ESE of West Yellowstone, Montana
  8. 1.5 32 km E of West Yellowstone, Montana
  9. 2.3 47 km SE of West Yellowstone, Montana
  10. 1.7 35 km ESE of West Yellowstone, Montana
  11. 2.2 35 km ESE of West Yellowstone, Montana
  12. 2.0 35 km ESE of West Yellowstone, Montana
  13. 1.6 25 km SSE of West Yellowstone, Montana
  14. 1.6 39 km SSE of Mammoth, Wyoming
  15. 1.9 50 km SSE of Mammoth, Wyoming

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.