QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

4 km NW of Redstone, Colorado

· 5.0 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pitkin County 31 kmGunnison County 62 kmDelta County 63 kmEagle County 69 kmGarfield County 70 kmLake County 80 kmChaffee County 100 kmMesa County 104 kmSummit County 108 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 2.8 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Pitkin County, 31 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3455 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 39.2052, -107.2793. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pitkin County, CO 31 km (19 mi) W of here earthquakes near Pitkin County
Gunnison County, CO 62 km (39 mi) NNW of here earthquakes near Gunnison County
Delta County, CO 63 km (39 mi) NE of here earthquakes near Delta County
Eagle County, CO 69 km (43 mi) SW of here earthquakes near Eagle County
Garfield County, CO 70 km (43 mi) SE of here earthquakes near Garfield County
Lake County, CO 80 km (50 mi) W of here earthquakes near Lake County

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

Aftershocks so far

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

  1. 2.8 10 km NE of Redstone, Colorado
  2. 2.6 12 km S of Mulford, Colorado
  3. 2.9 6 km NNE of Chacra, Colorado
  4. 1.9 6 km WNW of Snowmass Village, Colorado
  5. 1.5 13 km ENE of Paonia, Colorado
  6. 1.8 2 km NNW of El Jebel, Colorado
  7. 2.8 9 km E of Woody Creek, Colorado
  8. 2.0 6 km E of Basalt, Colorado
  9. 1.6 6 km E of Basalt, Colorado
  10. 1.5 5 km SSW of Carbondale, Colorado
  11. 1.9 11 km E of Paonia, Colorado
  12. 1.6 9 km ESE of Paonia, Colorado
  13. 1.8 11 km NNE of Paonia, Colorado
  14. 2.4 9 km NW of Mount Crested Butte, Colorado
  15. 1.9 10 km SE of Crystal, Colorado

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.