QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

9 km NNE of New Castle, Colorado

· 5.0 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garfield County 36 kmEagle County 69 kmRio Blanco County 70 kmPitkin County 70 kmDelta County 93 kmRoutt County 102 kmMesa County 109 kmLake County 111 kmGunnison County 116 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
Garfield County, 36 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1366 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 39.6531, -107.4995. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Garfield County, CO 36 km (22 mi) E of here earthquakes near Garfield County
Eagle County, CO 69 km (43 mi) W of here earthquakes near Eagle County
Rio Blanco County, CO 70 km (43 mi) ESE of here earthquakes near Rio Blanco County
Pitkin County, CO 70 km (43 mi) NW of here earthquakes near Pitkin County
Delta County, CO 93 km (58 mi) NNE of here earthquakes near Delta County
Routt County, CO 102 km (63 mi) SSW of here earthquakes near Routt County

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

Aftershocks so far

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

  1. 2.2 10 km NW of Dotsero, Colorado
  2. 2.5 30 km NNW of Dotsero, Colorado
  3. 2.1 6 km NNW of Chacra, Colorado
  4. 2.5 22 km NNW of New Castle, Colorado
  5. 2.9 6 km NNE of Chacra, Colorado
  6. 2.5 7 km NNW of Chacra, Colorado
  7. 2.6 6 km NNW of Chacra, Colorado
  8. 2.9 8 km NNW of Chacra, 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.