QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

2 km NW of Alpine Northeast, Wyoming

· 9.2 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bonneville County 52 kmTeton County 63 kmCaribou County 63 kmMadison County 81 kmSublette County 104 kmTeton County 105 kmBear Lake County 106 kmBingham County 111 kmLincoln County 113 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
9.2 km below the surface
Felt
no reports yet
Nearest
Bonneville County, 52 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1654 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 43.2120, -111.0350. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bonneville County, ID 52 km (32 mi) ESE of here earthquakes near Bonneville County
Teton County, ID 63 km (39 mi) SSE of here earthquakes near Teton County
Caribou County, ID 63 km (39 mi) NE of here earthquakes near Caribou County
Madison County, ID 81 km (51 mi) SE of here earthquakes near Madison County
Sublette County, WY 104 km (64 mi) WNW of here earthquakes near Sublette County
Teton County, WY 105 km (65 mi) SSW of here earthquakes near Teton County

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

Aftershocks so far

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

  1. 2.3 5 km S of Alpine, Wyoming
  2. 1.7 33 km NNE of Soda Springs, Idaho
  3. 2.1 10 km WSW of Bondurant, Wyoming
  4. 1.8 34 km W of Freedom, Idaho
  5. 2.1 34 km NNE of Soda Springs, Idaho
  6. 2.7 34 km NNE of Soda Springs, Idaho
  7. 2.7 36 km NNE of Soda Springs, Idaho
  8. 1.8 34 km NNE of Soda Springs, Idaho
  9. 1.8 34 km NNE of Soda Springs, Idaho
  10. 3.6 32 km NNE of Soda Springs, Idaho
  11. 2.7 34 km NNE of Soda Springs, Idaho
  12. 1.6 Wyoming
  13. 1.8 4 km W of Rafter J Ranch, Wyoming
  14. 1.8 2 km NNE of Freedom, Idaho
  15. 1.6 8 km S of Victor, Idaho

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.