QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

18 km W of Portage, Utah

· 5.4 km deep · released about 82 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Oneida County 25 kmFranklin County 57 kmBox Elder County 63 kmCache County 64 kmBannock County 83 kmPower County 88 kmWeber County 91 kmBear Lake County 100 kmCassia County 103 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 2.3 (ml)
Depth
5.4 km below the surface
Felt
no reports yet
Nearest
Oneida County, 25 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1788 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 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 82 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 41.9608, -112.4550. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Oneida County, ID 25 km (16 mi) SSE of here earthquakes near Oneida County
Franklin County, ID 57 km (36 mi) WSW of here earthquakes near Franklin County
Box Elder County, UT 63 km (39 mi) NE of here earthquakes near Box Elder County
Cache County, UT 64 km (40 mi) WNW of here earthquakes near Cache County
Bannock County, ID 83 km (52 mi) SSW of here earthquakes near Bannock County
Power County, ID 88 km (54 mi) SSE of here earthquakes near Power County

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

Aftershocks so far

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

  1. 1.7 8 km ENE of Howell, Utah
  2. 1.6 10 km E of Snowville, Utah
  3. 2.2 7 km SE of Snowville, Utah
  4. 1.9 16 km SW of Thatcher, Utah
  5. 1.8 23 km N of Snowville, Utah
  6. 1.9 7 km NE of Howell, Utah
  7. 1.7 16 km SW of Thatcher, Utah
  8. 1.8 Utah
  9. 2.0 Utah
  10. 1.6 11 km E of Snowville, Utah
  11. 1.7 Utah
  12. 2.5 2 km NNW of Benson, Utah
  13. 3.2 1 km NE of Benson, Utah
  14. 1.9 Utah
  15. 2.7 1 km NNE of Benson, 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.