QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

40 km SSE of West Yellowstone, Montana

· 8.2 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 48 kmFremont County 51 kmTeton County 70 kmMadison County 88 kmPark County 102 kmClark 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
8.2 km below the surface
Felt
no reports yet
Nearest
Teton County, 48 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 829 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× 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 44.3412, -110.8658. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, WY 48 km (30 mi) NW of here earthquakes near Teton County
Fremont County, ID 51 km (32 mi) ENE of here earthquakes near Fremont County
Teton County, ID 70 km (44 mi) NNE of here earthquakes near Teton County
Madison County, ID 88 km (55 mi) NE of here earthquakes near Madison County
Park County, WY 102 km (64 mi) W of here earthquakes near Park County
Clark County, ID 119 km (74 mi) E of here earthquakes near Clark County

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

Aftershocks so far

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

  1. 1.6 24 km SSW of Mammoth, Wyoming
  2. 2.5 24 km SSW of Mammoth, Wyoming
  3. 1.5 24 km SSW of Mammoth, Wyoming
  4. 1.8 24 km SSW of Mammoth, Wyoming
  5. 2.0 24 km SSW of Mammoth, Wyoming
  6. 3.7 24 km SSW of Mammoth, Wyoming
  7. 1.9 51 km SE of West Yellowstone, Montana
  8. 1.6 25 km SSW of Mammoth, Wyoming
  9. 2.4 25 km SSW of Mammoth, Wyoming
  10. 1.9 46 km SSE of Mammoth, Wyoming
  11. 1.7 56 km ENE of Warm River, Idaho
  12. 1.8 33 km ESE of West Yellowstone, Montana
  13. 1.8 55 km SE of West Yellowstone, Montana
  14. 2.0 49 km NNE of Kelly, Wyoming
  15. 2.7 43 km SE 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.