QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

27 km SSW of Irwin, Idaho

· 0.4 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bonneville County 30 kmCaribou County 45 kmTeton County 67 kmMadison County 71 kmBingham County 80 kmBannock County 86 kmBear Lake County 99 kmJefferson County 101 kmFremont 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 2.1 (ml)
Depth
0.4 km below the surface
Felt
no reports yet
Nearest
Bonneville County, 30 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1230 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 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 43.1775, -111.4102. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bonneville County, ID 30 km (18 mi) SE of here earthquakes near Bonneville County
Caribou County, ID 45 km (28 mi) NNE of here earthquakes near Caribou County
Teton County, ID 67 km (42 mi) SSW of here earthquakes near Teton County
Madison County, ID 71 km (44 mi) SSE of here earthquakes near Madison County
Bingham County, ID 80 km (50 mi) E of here earthquakes near Bingham County
Bannock County, ID 86 km (53 mi) NE of here earthquakes near Bannock County

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

Aftershocks so far

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

  1. 2.6 5 km NNE of Star Valley Ranch, Wyoming
  2. 2.9 15 km WSW of Freedom, Idaho
  3. 2.0 13 km E of Irwin, Idaho
  4. 1.6 22 km ENE of Soda Springs, Idaho
  5. 2.5 17 km E of Irwin, Idaho
  6. 2.0 9 km ESE of Alpine Northeast, Wyoming
  7. 2.3 3 km NNE of Star Valley Ranch, Wyoming
  8. 2.8 5 km NE of Star Valley Ranch, Wyoming
  9. 1.7 5 km N of Alpine Northeast, Wyoming
  10. 2.2 12 km NNW of Alpine Northeast, Wyoming
  11. 1.9 19 km SSW of Irwin, Idaho
  12. 1.6 32 km W of Freedom, Idaho
  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.

On USGS

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