QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

5 km NNE of Alta, Wyoming

· 11 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 17 kmMadison County 52 kmTeton County 54 kmFremont County 60 kmBonneville County 67 kmJefferson 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 1.8 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Teton County, 17 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1742 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 43.8005, -111.0063. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, ID 17 km (11 mi) ENE of here earthquakes near Teton County
Madison County, ID 52 km (32 mi) E of here earthquakes near Madison County
Teton County, WY 54 km (34 mi) WSW of here earthquakes near Teton County
Fremont County, ID 60 km (37 mi) SE of here earthquakes near Fremont County
Bonneville County, ID 67 km (42 mi) NE of here earthquakes near Bonneville County
Jefferson County, ID 105 km (65 mi) E of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.5 11 km SE of Kelly, Wyoming
  2. 1.5 11 km SE of Kelly, Wyoming
  3. 2.5 11 km ESE of Kelly, Wyoming
  4. 1.5 15 km NNE of Alta, Wyoming
  5. 1.5 15 km NNE of Alta, Wyoming
  6. 2.4 8 km ESE of Kelly, Wyoming
  7. 1.8 17 km WSW of Wilson, Wyoming
  8. 2.4 12 km E of Irwin, Idaho
  9. 2.9 13 km ESE of Kelly, Wyoming
  10. 1.8 8 km NW of Wilson, Wyoming
  11. 1.5 8 km NW of Wilson, Wyoming
  12. 2.1 8 km WNW of Wilson, Wyoming
  13. 1.9 9 km E of Kelly, Wyoming
  14. 3.9 13 km NNE of Tetonia, Idaho
  15. 1.8 4 km W of Rafter J 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.