QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

22 km SSW of Saint George, Utah

· 6.8 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 42 kmIron County 116 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 1.9 (ml)
Depth
6.8 km below the surface
Felt
no reports yet
Nearest
Washington County, 42 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2183 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 23 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 36.9058, -113.6485. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, UT 42 km (26 mi) SSW of here earthquakes near Washington County
Iron County, UT 116 km (72 mi) SSW of here earthquakes near Iron County
Lincoln County, NV 135 km (84 mi) SE of here earthquakes near Lincoln County

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

Aftershocks so far

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

  1. 1.6 41 km SSE of Saint George, Utah
  2. 2.7 56 km SE of Scenic, Arizona
  3. 1.6 11 km NNE of Beaver Dam, Arizona
  4. 2.0 37 km SSE of Saint George, Utah
  5. 1.8 3 km SW of Saint George, Utah
  6. 1.8 13 km SSW of Saint George, Utah
  7. 2.9 10 km SSE of Washington, Utah
  8. 1.7 14 km NE of Beaver Dam, Arizona
  9. 1.7 13 km NE of Beaver Dam, Arizona
  10. 2.3 10 km N of Beaver Dam, Arizona
  11. 1.6 10 km W of Ivins, Utah
  12. 1.6 16 km SW of Apple Valley, Utah
  13. 2.1 14 km NNE of Beaver Dam, Arizona
  14. 1.8 14 km NNE of Beaver Dam, Arizona
  15. 1.6 18 km WSW of Santa Clara, 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.