QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

14 km ESE of Richmond, Utah

· 6.1 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cache County 18 kmFranklin County 36 kmRich County 43 kmBear Lake County 53 kmWeber County 70 kmOneida County 80 kmMorgan County 87 kmLincoln County 89 kmCaribou County 102 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
6.1 km below the surface
Felt
no reports yet
Nearest
Cache County, 18 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1713 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 41.8742, -111.6465. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cache County, UT 18 km (11 mi) NNE of here earthquakes near Cache County
Franklin County, ID 36 km (23 mi) SSE of here earthquakes near Franklin County
Rich County, UT 43 km (27 mi) NW of here earthquakes near Rich County
Bear Lake County, ID 53 km (33 mi) SSW of here earthquakes near Bear Lake County
Weber County, UT 70 km (43 mi) NNE of here earthquakes near Weber County
Oneida County, ID 80 km (50 mi) ESE of here earthquakes near Oneida County

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

Aftershocks so far

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

  1. 1.7 Utah
  2. 2.5 2 km NNW of Benson, Utah
  3. 3.2 1 km NE of Benson, Utah
  4. 1.9 Utah
  5. 2.7 1 km NNE of Benson, Utah
  6. 1.8 1 km NNE of Benson, Utah
  7. 1.9 3 km NNW of Benson, Utah
  8. 2.8 2 km N of Benson, Utah
  9. 2.0 0 km ENE of Benson, Utah
  10. 2.6 2 km NW of Benson, Utah
  11. 2.5 2 km NNE of Benson, Utah
  12. 2.3 0 km NW of Benson, Utah
  13. 2.6 3 km SSE of Trenton, Utah
  14. 1.6 3 km NW of Amalga, Utah
  15. 2.1 10 km E of Providence, 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.