QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

19 km W of Portage, Utah

· 4.5 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Oneida County 22 kmFranklin County 57 kmBox Elder County 64 kmCache County 66 kmBannock County 81 kmPower County 84 kmWeber County 94 kmBear Lake County 100 kmCassia County 101 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
4.5 km below the surface
Felt
no reports yet
Nearest
Oneida County, 22 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1677 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 41.9867, -112.4698. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Oneida County, ID 22 km (14 mi) S of here earthquakes near Oneida County
Franklin County, ID 57 km (36 mi) WSW of here earthquakes near Franklin County
Box Elder County, UT 64 km (39 mi) NE of here earthquakes near Box Elder County
Cache County, UT 66 km (41 mi) WNW of here earthquakes near Cache County
Bannock County, ID 81 km (50 mi) SSW of here earthquakes near Bannock County
Power County, ID 84 km (52 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

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

  1. 1.6 6 km WSW of Clifton, Idaho
  2. 1.8 6 km WSW of Clifton, Idaho
  3. 1.7 7 km WSW of Clifton, Idaho
  4. 1.5 8 km SW of Clifton, Idaho
  5. 1.9 6 km WSW of Clifton, Idaho
  6. 2.4 6 km SW of Clifton, Idaho
  7. 2.5 8 km SW of Clifton, Idaho
  8. 2.2 7 km SW of Clifton, Idaho
  9. 1.9 7 km SW of Clifton, Idaho
  10. 2.8 7 km SW of Clifton, Idaho
  11. 2.3 7 km WSW of Clifton, Idaho
  12. 2.0 7 km SW of Clifton, Idaho
  13. 1.9 8 km WSW of Clifton, Idaho
  14. 1.5 9 km WSW of Clifton, Idaho
  15. 1.8 10 km E of Snowville, 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

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