QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

5 km NE of Koosharem, Utah

· 7.7 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sevier County 22 kmPiute County 35 kmWayne County 81 kmGarfield County 87 kmSanpete County 94 kmEmery 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 1.9 (ml)
Depth
7.7 km below the surface
Felt
no reports yet
Nearest
Sevier County, 22 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 307 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 20 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 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 38.5488, -111.8387. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sevier County, UT 22 km (14 mi) S of here earthquakes near Sevier County
Piute County, UT 35 km (22 mi) NE of here earthquakes near Piute County
Wayne County, UT 81 km (50 mi) WNW of here earthquakes near Wayne County
Garfield County, UT 87 km (54 mi) NNW of here earthquakes near Garfield County
Sanpete County, UT 94 km (59 mi) SSW of here earthquakes near Sanpete County
Emery County, UT 110 km (68 mi) WSW of here earthquakes near Emery County

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

Aftershocks so far

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

  1. 0.7 6 km SW of Marysvale, Utah
  2. 1.8 7 km SSE of Salina, Utah
  3. 2.6 10 km NE of Marysvale, Utah
  4. 1.6 7 km SSW of Joseph, Utah
  5. 1.5 9 km NW of Junction, Utah
  6. 1.8 28 km NE of Fremont, Utah
  7. 2.0 27 km NNE of Fremont, Utah
  8. 1.7 31 km N of Fremont, Utah
  9. 1.7 21 km WSW of Emery, Utah
  10. 2.0 5 km NNW of Junction, Utah
  11. 1.5 4 km NW of Junction, Utah
  12. 1.9 5 km NNW of Junction, Utah
  13. 1.6 6 km S of Joseph, Utah
  14. 1.9 30 km N of Fremont, Utah
  15. 1.5 7 km S of Joseph, 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.