QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

47 km SW of Howell, Utah

· 5.2 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Box Elder County 19 kmDavis County 78 kmOneida County 80 kmWeber County 88 kmCache County 97 kmCassia County 105 kmFranklin County 114 kmTooele County 119 kmMorgan County 119 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 (ml)
Depth
5.2 km below the surface
Felt
no reports yet
Nearest
Box Elder County, 19 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1991 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 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× 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 41.5187, -112.8805. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Box Elder County, UT 19 km (12 mi) SE of here earthquakes near Box Elder County
Davis County, UT 78 km (48 mi) NW of here earthquakes near Davis County
Oneida County, ID 80 km (50 mi) SSW of here earthquakes near Oneida County
Weber County, UT 88 km (55 mi) WNW of here earthquakes near Weber County
Cache County, UT 97 km (60 mi) WSW of here earthquakes near Cache County
Cassia County, ID 105 km (65 mi) SE of here earthquakes near Cassia County

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

Aftershocks so far

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

  1. 1.7 16 km SW of Thatcher, Utah
  2. 2.0 Utah
  3. 1.9 66 km NW of Grantsville, Utah
  4. 2.0 Utah
  5. 1.6 70 km W of Hooper, Utah
  6. 1.6 46 km SW of Howell, Utah
  7. 1.8 Utah
  8. 2.1 70 km NW of Grantsville, Utah
  9. 2.0 Utah
  10. 2.1 2 km SSW of Howell, Utah
  11. 2.1 86 km E of Montello, Nevada
  12. 1.5 58 km W of Hooper, Utah
  13. 1.6 14 km WNW of Howell, Utah
  14. 1.7 24 km SSW of Snowville, Utah
  15. 2.0 67 km W of Hooper, 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.