QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

4 km W of Afton, Wyoming

· 3.2 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caribou County 46 kmBear Lake County 57 kmLincoln County 61 kmSublette County 87 kmBonneville County 90 kmFranklin County 93 kmBannock County 102 kmTeton County 116 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 2.4 (ml)
Depth
3.2 km below the surface
Felt
no reports yet
Nearest
Caribou County, 46 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1115 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 92,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.2× the energy of this one
  4. This earthquake M 2.4 about 120 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 42.7323, -110.9865. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Caribou County, ID 46 km (29 mi) E of here earthquakes near Caribou County
Bear Lake County, ID 57 km (35 mi) NNE of here earthquakes near Bear Lake County
Lincoln County, WY 61 km (38 mi) NNW of here earthquakes near Lincoln County
Sublette County, WY 87 km (54 mi) W of here earthquakes near Sublette County
Bonneville County, ID 90 km (56 mi) SE of here earthquakes near Bonneville County
Franklin County, ID 93 km (58 mi) NE of here earthquakes near Franklin County

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

Aftershocks so far

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

  1. 2.8 5 km NE of Star Valley Ranch, Wyoming
  2. 2.5 14 km ENE of Soda Springs, Idaho
  3. 1.6 16 km ENE of Bennington, Idaho
  4. 3.8 19 km WSW of Fairview, Wyoming
  5. 1.8 21 km NNE of Georgetown, Idaho
  6. 1.6 32 km W of Freedom, Idaho
  7. 1.6 12 km ENE of Soda Springs, Idaho
  8. 2.5 10 km ENE of Soda Springs, Idaho
  9. 2.6 8 km NE of Soda Springs, Idaho
  10. 2.0 16 km ENE of Etna, Wyoming
  11. 1.9 18 km SW of Fairview, Wyoming
  12. 2.7 10 km W of Fairview, Wyoming
  13. 3.0 7 km W of Thayne, Wyoming
  14. 2.3 4 km WSW of Thayne, Wyoming
  15. 2.7 7 km SW of Freedom, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.3 on 2017-09-02 — it released about 23,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.