QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

3 km NNW of Mount Crested Butte, Colorado

· 5.0 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gunnison County 30 kmPitkin County 32 kmLake County 62 kmChaffee County 63 kmDelta County 77 kmEagle County 81 kmSummit County 105 kmGarfield County 109 kmPark County 111 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 2.1 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Gunnison County, 30 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2368 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 38.9359, -106.9781. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gunnison County, CO 30 km (19 mi) NNE of here earthquakes near Gunnison County
Pitkin County, CO 32 km (20 mi) S of here earthquakes near Pitkin County
Lake County, CO 62 km (38 mi) WSW of here earthquakes near Lake County
Chaffee County, CO 63 km (39 mi) WNW of here earthquakes near Chaffee County
Delta County, CO 77 km (48 mi) E of here earthquakes near Delta County
Eagle County, CO 81 km (50 mi) SSW of here earthquakes near Eagle County

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

Aftershocks so far

11 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. 1.9 6 km WNW of Snowmass Village, Colorado
  4. 1.5 13 km ENE of Paonia, Colorado
  5. 2.8 9 km E of Woody Creek, Colorado
  6. 2.0 6 km E of Basalt, Colorado
  7. 1.6 6 km E of Basalt, Colorado
  8. 1.9 11 km E of Paonia, Colorado
  9. 1.6 9 km ESE of Paonia, Colorado
  10. 2.4 9 km NW of Mount Crested Butte, Colorado
  11. 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.