QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8ml

37 km ENE of Thompson Springs, Utah

· 6.8 km deep · released about 6.6 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grand County 26 kmMesa County 72 kmMontrose County 115 kmUintah County 120 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 3.8 (ml)
Depth
6.8 km below the surface
Felt
100 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
Nearest
Grand County, 26 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1513 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 100 people have reported feeling it to USGS.

How big was it?

This earthquake released about 6.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 26,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 810× the energy of this one
  4. This earthquake M 3.8 about 6.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 14× 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 39.0608, -109.2958. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grand County, UT 26 km (16 mi) ENE of here earthquakes near Grand County
Mesa County, CO 72 km (45 mi) W of here earthquakes near Mesa County
Montrose County, CO 115 km (72 mi) NW of here earthquakes near Montrose County
Uintah County, UT 120 km (75 mi) S of here earthquakes near Uintah County
Carbon County, UT 130 km (81 mi) ESE of here earthquakes near Carbon County
Garfield County, CO 133 km (83 mi) WSW of here earthquakes near Garfield 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. 1.7 37 km NE of Thompson Springs, Utah
  2. 2.3 35 km SW of Loma, Colorado
  3. 1.8 35 km WSW of Loma, Colorado
  4. 1.9 42 km NNE of Thompson Springs, Utah
  5. 1.7 Utah
  6. 2.1 28 km NNE of Castle Valley, Utah
  7. 1.9 28 km NNE of Castle Valley, Utah
  8. 1.7 27 km NNE of Castle Valley, Utah
  9. 1.6 34 km E of Thompson Springs, Utah
  10. 1.8 27 km NNE of Castle Valley, Utah
  11. 1.6 28 km NNE of Castle Valley, Utah
  12. 1.8 27 km NNE of Castle Valley, Utah
  13. 1.9 27 km NNE of Castle Valley, Utah
  14. 1.7 29 km NNE of Castle Valley, Utah
  15. 1.6 27 km NNE of Castle 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.