QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

8 km SSW of Portage, Utah

· 3.1 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Oneida County 37 kmFranklin County 48 kmCache County 48 kmBox Elder County 72 kmWeber County 78 kmBannock County 88 kmBear Lake County 89 kmRich County 92 kmDavis County 97 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 2.2 (ml)
Depth
3.1 km below the surface
Felt
no reports yet
Nearest
Oneida County, 37 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1684 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 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 41.9043, -112.2807. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Oneida County, ID 37 km (23 mi) SSE of here earthquakes near Oneida County
Franklin County, ID 48 km (30 mi) SW of here earthquakes near Franklin County
Cache County, UT 48 km (30 mi) WNW of here earthquakes near Cache County
Box Elder County, UT 72 km (45 mi) ENE of here earthquakes near Box Elder County
Weber County, UT 78 km (49 mi) NNW of here earthquakes near Weber County
Bannock County, ID 88 km (55 mi) S of here earthquakes near Bannock County

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

Aftershocks so far

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

  1. 1.5 7 km SW of Corinne, Utah
  2. 1.7 Utah
  3. 2.5 2 km NNW of Benson, Utah
  4. 3.2 1 km NE of Benson, Utah
  5. 1.9 Utah
  6. 2.7 1 km NNE of Benson, Utah
  7. 1.8 1 km NNE of Benson, Utah
  8. 1.9 3 km NNW of Benson, Utah
  9. 2.8 2 km N of Benson, Utah
  10. 2.0 0 km ENE of Benson, Utah
  11. 2.6 2 km NW of Benson, Utah
  12. 2.5 2 km NNE of Benson, Utah
  13. 2.3 0 km NW of Benson, Utah
  14. 2.6 3 km SSE of Trenton, Utah
  15. 1.7 7 km SW of Corinne, Utah

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.