QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

32 km ESE of Island Park, Idaho

· 13 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 40 kmTeton County 54 kmTeton County 62 kmMadison County 77 kmClark County 108 kmBonneville County 112 kmPark County 114 kmJefferson County 119 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
13 km below the surface
Felt
no reports yet
Nearest
Fremont County, 40 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 867 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 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 44.2983, -111.0000. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 40 km (25 mi) ENE of here earthquakes near Fremont County
Teton County, WY 54 km (33 mi) WNW of here earthquakes near Teton County
Teton County, ID 62 km (39 mi) NNE of here earthquakes near Teton County
Madison County, ID 77 km (48 mi) NE of here earthquakes near Madison County
Clark County, ID 108 km (67 mi) E of here earthquakes near Clark County
Bonneville County, ID 112 km (70 mi) NNE of here earthquakes near Bonneville County

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

Aftershocks so far

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

  1. 1.6 30 km ESE of West Yellowstone, Montana
  2. 1.5 45 km ESE of West Yellowstone, Montana
  3. 1.6 6 km NNE of West Yellowstone, Montana
  4. 1.5 6 km NNE of West Yellowstone, Montana
  5. 2.1 8 km NE of West Yellowstone, Montana
  6. 1.7 8 km NE of West Yellowstone, Montana
  7. 2.0 18 km ENE of West Yellowstone, Montana
  8. 1.9 6 km ESE of West Yellowstone, Montana
  9. 1.9 6 km ESE of West Yellowstone, Montana
  10. 2.1 6 km ESE of West Yellowstone, Montana
  11. 1.6 6 km SE of Hebgen Lake Estates, Montana
  12. 1.6 6 km NNE of West Yellowstone, Montana
  13. 1.8 5 km NNE of West Yellowstone, Montana
  14. 1.5 6 km NNE of West Yellowstone, Montana
  15. 1.6 5 km NNE of West Yellowstone, Montana

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.