QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

29 km NNE of Castle Valley, Utah

· 6.0 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grand County 26 kmMesa County 74 kmMontrose County 104 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 1.7 (md)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Grand County, 26 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1538 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 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 38.8912, -109.2953. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grand County, UT 26 km (16 mi) ESE of here earthquakes near Grand County
Mesa County, CO 74 km (46 mi) W of here earthquakes near Mesa County
Montrose County, CO 104 km (65 mi) WNW of here earthquakes near Montrose County
San Miguel County, CO 124 km (77 mi) NW of here earthquakes near San Miguel County
Carbon County, UT 141 km (88 mi) SE of here earthquakes near Carbon County

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

Aftershocks so far

13 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

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.