QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

9 km NNE of Tetonia, Idaho

· 7.2 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 17 kmMadison County 44 kmFremont County 46 kmTeton County 58 kmBonneville County 69 kmJefferson County 96 kmClark County 107 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 2.1 (ml)
Depth
7.2 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Teton County, 17 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2381 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 43.8984, -111.1254. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, ID 17 km (10 mi) NNE of here earthquakes near Teton County
Madison County, ID 44 km (28 mi) ENE of here earthquakes near Madison County
Fremont County, ID 46 km (28 mi) SE of here earthquakes near Fremont County
Teton County, WY 58 km (36 mi) WSW of here earthquakes near Teton County
Bonneville County, ID 69 km (43 mi) NE of here earthquakes near Bonneville County
Jefferson County, ID 96 km (60 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

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

  1. 1.6 11 km S of Victor, Idaho
  2. 1.8 5 km NNE of Alta, Wyoming
  3. 2.0 Wyoming
  4. 1.8 46 km NE of Alta, Wyoming
  5. 2.2 46 km NE of Alta, Wyoming
  6. 2.5 46 km NE of Alta, Wyoming
  7. 1.9 46 km NE of Alta, Wyoming
  8. 1.7 9 km ENE of Alta, Wyoming
  9. 1.6 10 km ENE of Alta, Wyoming
  10. 2.4 10 km ENE of Alta, Wyoming
  11. 3.0 44 km ENE of Warm River, Idaho
  12. 1.6 Wyoming
  13. 2.3 43 km ENE of Warm River, Idaho
  14. 1.9 43 km ENE of Warm River, Idaho
  15. 1.6 43 km ENE of Warm River, 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.

On USGS

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