QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

33 km E of Afton, Wyoming

· 12 km deep · released about 24 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sublette County 50 kmLincoln County 58 kmBear Lake County 83 kmCaribou County 83 kmBonneville 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 1.9 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Sublette County, 50 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2672 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 24 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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 42.7362, -110.5257. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sublette County, WY 50 km (31 mi) W of here earthquakes near Sublette County
Lincoln County, WY 58 km (36 mi) NNE of here earthquakes near Lincoln County
Bear Lake County, ID 83 km (51 mi) NE of here earthquakes near Bear Lake County
Caribou County, ID 83 km (52 mi) E of here earthquakes near Caribou County
Bonneville County, ID 115 km (72 mi) SE of here earthquakes near Bonneville County
Franklin County, ID 123 km (77 mi) ENE of here earthquakes near Franklin County

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

Aftershocks so far

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

  1. 2.6 5 km NNE of Star Valley Ranch, Wyoming
  2. 2.3 3 km NNE of Star Valley Ranch, Wyoming
  3. 2.8 5 km NE of Star Valley Ranch, Wyoming
  4. 2.0 16 km ENE of Etna, Wyoming
  5. 2.3 4 km WSW of Thayne, Wyoming
  6. 2.3 17 km NE of Star Valley Ranch, Wyoming
  7. 2.8 15 km NE of Star Valley Ranch, Wyoming
  8. 2.7 6 km E of Etna, Wyoming
  9. 2.5 8 km E of Star Valley Ranch, Wyoming
  10. 2.6 10 km S of Bondurant, Wyoming
  11. 1.6 18 km NE of Star Valley Ranch, Wyoming
  12. 1.5 18 km ENE of Star Valley Ranch, Wyoming
  13. 1.8 14 km SSE of Bondurant, Wyoming
  14. 2.0 19 km ENE of Star Valley Ranch, Wyoming
  15. 2.8 18 km NE of Star Valley Ranch, 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.