QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

4 km E of Washington, Utah

· 11 km deep · released about 74 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 16 kmIron County 88 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 2.3 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Washington County, 16 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3100 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 74 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 74 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 37.1223, -113.4552. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, UT 16 km (10 mi) S of here earthquakes near Washington County
Iron County, UT 88 km (55 mi) S of here earthquakes near Iron County

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

Aftershocks so far

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

  1. 1.6 34 km S of Saint George, Utah
  2. 1.6 17 km SSE of Saint George, Utah
  3. 1.6 16 km SSE of Saint George, Utah
  4. 1.6 17 km SSE of Saint George, Utah
  5. 1.7 17 km NW of Veyo, Utah
  6. 1.5 17 km SSE of Saint George, Utah
  7. 1.8 17 km SSE of Saint George, Utah
  8. 3.0 18 km SSE of Saint George, Utah
  9. 1.9 17 km SSE of Saint George, Utah
  10. 1.8 Utah
  11. 3.1 19 km SSE of Saint George, Utah
  12. 2.6 17 km SSE of Saint George, Utah
  13. 1.8 16 km SSE of Saint George, Utah
  14. 2.3 2 km NNE of Beaver Dam, Arizona
  15. 1.7 6 km NNE of Beaver Dam, Arizona

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.