QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

2 km N of Benson, Utah

· 7.4 km deep · released about 510 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cache County 17 kmFranklin County 42 kmWeber County 60 kmRich County 60 kmOneida County 65 kmBear Lake County 73 kmMorgan County 85 kmDavis County 88 kmBox Elder County 96 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 2.8 (ml)
Depth
7.4 km below the surface
Felt
145 reports · strongest reported intensity III
Nearest
Cache County, 17 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1271 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 145 people have reported feeling it to USGS.

How big was it?

This earthquake released about 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 41.8058, -111.9253. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cache County, UT 17 km (11 mi) WNW of here earthquakes near Cache County
Franklin County, ID 42 km (26 mi) SSW of here earthquakes near Franklin County
Weber County, UT 60 km (37 mi) N of here earthquakes near Weber County
Rich County, UT 60 km (37 mi) WNW of here earthquakes near Rich County
Oneida County, ID 65 km (40 mi) SE of here earthquakes near Oneida County
Bear Lake County, ID 73 km (45 mi) SW of here earthquakes near Bear Lake County

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

Aftershocks so far

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

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

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.