QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

12 km S of Snowville, Utah

· 6.4 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Box Elder County 39 kmOneida County 40 kmCache County 80 kmFranklin County 81 kmCassia County 91 kmWeber County 94 kmPower County 95 kmDavis County 99 kmBannock 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 1.8 (md)
Depth
6.4 km below the surface
Felt
no reports yet
Nearest
Box Elder County, 39 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2126 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 41.8495, -112.6975. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Box Elder County, UT 39 km (24 mi) NE of here earthquakes near Box Elder County
Oneida County, ID 40 km (25 mi) SSW of here earthquakes near Oneida County
Cache County, UT 80 km (50 mi) W of here earthquakes near Cache County
Franklin County, ID 81 km (50 mi) WSW of here earthquakes near Franklin County
Cassia County, ID 91 km (56 mi) ESE of here earthquakes near Cassia County
Weber County, UT 94 km (58 mi) NW of here earthquakes near Weber County

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

Aftershocks so far

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

  1. 1.7 Utah
  2. 1.6 Utah
  3. 1.8 13 km NNE of Howell, Utah
  4. 2.1 12 km NNE of Howell, Utah
  5. 1.6 Utah
  6. 1.9 5 km W of Garland, Utah
  7. 1.5 10 km SSW of Malad City, Idaho
  8. 2.1 2 km SSW of Howell, Utah
  9. 1.7 9 km E of Snowville, Utah
  10. 1.6 14 km WNW of Howell, Utah
  11. 1.7 24 km SSW of Snowville, Utah
  12. 2.0 19 km S of Snowville, Utah
  13. 1.6 12 km NNE of Howell, Utah
  14. 2.0 17 km WSW of Howell, Utah
  15. 2.1 19 km W of Portage, 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.