QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

19 km SSE of Saint George, Utah

· 4.8 km deep · released about 1,400 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 36 kmIron County 110 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 3.1 (ml)
Depth
4.8 km below the surface
Felt
12 reports · strongest reported intensity II
Measured shaking
intensity III (ShakeMap)
Nearest
Washington County, 36 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2735 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 12 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× more

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 36.9383, -113.5160. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, UT 36 km (22 mi) S of here earthquakes near Washington County
Iron County, UT 110 km (68 mi) S of here earthquakes near Iron County
Lincoln County, NV 142 km (88 mi) ESE of here earthquakes near Lincoln 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. 1.7 6 km N of Saint George, Utah
  2. 3.4 24 km S of Centennial Park, Arizona
  3. 2.7 31 km SSE of Saint George, Utah
  4. 1.5 15 km S of Saint George, Utah
  5. 1.5 12 km E of Pine Valley, Utah
  6. 1.5 16 km SSE of Saint George, Utah
  7. 2.1 3 km SW of Centennial Park, Arizona
  8. 1.9 8 km S of Saint George, Utah
  9. 2.1 17 km NNW of Beaver Dam, Arizona
  10. 2.2 8 km SSW of Leeds, Utah
  11. 2.5 16 km SSE of Saint George, Utah
  12. 1.5 18 km SSE of Saint George, Utah
  13. 2.0 0 km ESE of Virgin, Utah
  14. 2.2 21 km SSE of Saint George, Utah
  15. 1.5 9 km ESE of Pine Valley, 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.