QuakeIndex

Earthquake · reviewed by a seismologist

M 4.5mw

29 km E of La Sal, Utah

· 0.8 km deep · released about 82 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Miguel County 52 kmMontrose County 58 kmDolores County 70 kmMesa County 91 kmGrand County 96 kmOuray County 99 kmSan Juan County 108 kmMontezuma County 108 kmDelta County 112 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 4.5 (mw)
Depth
0.8 km below the surface
Felt
695 reports · strongest reported intensity V
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
San Miguel County, 52 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 426 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 695 people have reported feeling it to USGS.

How big was it?

This earthquake released about 82 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,100× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 92× the energy of this one
  3. Magna, Utah 2020 M 5.7 65× the energy of this one
  4. This earthquake M 4.5 about 82 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 170× 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 38.2803, -108.9110. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Miguel County, CO 52 km (32 mi) NW of here earthquakes near San Miguel County
Montrose County, CO 58 km (36 mi) WSW of here earthquakes near Montrose County
Dolores County, CO 70 km (44 mi) NNW of here earthquakes near Dolores County
Mesa County, CO 91 km (57 mi) SSW of here earthquakes near Mesa County
Grand County, UT 96 km (60 mi) SE of here earthquakes near Grand County
Ouray County, CO 99 km (62 mi) W of here earthquakes near Ouray County

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

Aftershocks so far

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

  1. 1.6 28 km ESE of La Sal, Utah
  2. 2.1 28 km E of La Sal, Utah
  3. 2.2 28 km E of La Sal, Utah
  4. 2.0 28 km E of La Sal, Utah
  5. 2.1 28 km E of La Sal, Utah
  6. 1.6 30 km E of La Sal, Utah
  7. 1.5 29 km E of La Sal, Utah
  8. 1.5 29 km E of La Sal, Utah
  9. 2.1 20 km WSW of Naturita, Colorado
  10. 1.7 28 km E of La Sal, Utah
  11. 2.3 29 km E of La Sal, UT
  12. 1.9 28 km E of La Sal, Utah
  13. 1.7 28 km E of La Sal, Utah
  14. 4.3 28 km E of La Sal, Utah
  15. 3.3 28 km E of La Sal, 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.