QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

9 km WNW of Hiawatha, Utah

· 1.7 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sanpete County 43 kmCarbon County 48 kmEmery County 66 kmUtah County 82 kmWasatch County 91 kmDuchesne County 104 kmSevier County 105 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
1.7 km below the surface
Felt
no reports yet
Nearest
Sanpete County, 43 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2394 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 17 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 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 39.5158, -111.1122. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sanpete County, UT 43 km (27 mi) ENE of here earthquakes near Sanpete County
Carbon County, UT 48 km (30 mi) WSW of here earthquakes near Carbon County
Emery County, UT 66 km (41 mi) NNW of here earthquakes near Emery County
Utah County, UT 82 km (51 mi) SE of here earthquakes near Utah County
Wasatch County, UT 91 km (57 mi) S of here earthquakes near Wasatch County
Duchesne County, UT 104 km (65 mi) SW of here earthquakes near Duchesne County

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

Aftershocks so far

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

  1. 2.2 Utah
  2. 1.8 3 km N of Kenilworth, Utah
  3. 1.9 8 km W of Spring Glen, Utah
  4. 1.7 10 km WNW of Helper, Utah
  5. 1.7 3 km N of Kenilworth, Utah
  6. 1.5 12 km E of Fairview, Utah
  7. 1.6 11 km ENE of Fairview, Utah
  8. 1.8 3 km NNE of Helper, Utah
  9. 2.3 10 km SE of Manti, Utah
  10. 1.6 7 km ENE of Fairview, Utah
  11. 1.5 15 km ESE of Ephraim, Utah
  12. 1.7 18 km ESE of Spring City, Utah
  13. 1.7 12 km W of Clear Creek, Utah
  14. 1.6 Utah
  15. 2.1 5 km NNE of Fountain Green, 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.