QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

3 km SW of New Castle, Colorado

· 1.1 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garfield County 30 kmPitkin County 67 kmRio Blanco County 72 kmEagle County 75 kmDelta County 81 kmMesa County 97 kmGunnison County 107 kmLake County 111 kmRoutt County 115 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 2.9 (ml)
Depth
1.1 km below the surface
Felt
6 reports · strongest reported intensity IV
Nearest
Garfield County, 30 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3475 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 39.5478, -107.5668. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Garfield County, CO 30 km (19 mi) E of here earthquakes near Garfield County
Pitkin County, CO 67 km (42 mi) WNW of here earthquakes near Pitkin County
Rio Blanco County, CO 72 km (45 mi) SE of here earthquakes near Rio Blanco County
Eagle County, CO 75 km (47 mi) W of here earthquakes near Eagle County
Delta County, CO 81 km (50 mi) NNE of here earthquakes near Delta County
Mesa County, CO 97 km (60 mi) NE of here earthquakes near Mesa County

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

Aftershocks so far

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

  1. 2.2 10 km NW of Dotsero, Colorado
  2. 2.8 10 km NE of Redstone, Colorado
  3. 2.6 12 km S of Mulford, Colorado
  4. 2.1 6 km NNW of Chacra, Colorado
  5. 2.5 22 km NNW of New Castle, Colorado
  6. 2.9 6 km NNE of Chacra, Colorado
  7. 2.5 7 km NNW of Chacra, Colorado
  8. 2.6 6 km NNW of Chacra, Colorado
  9. 2.9 8 km NNW of Chacra, Colorado
  10. 2.1 9 km NNE of New Castle, Colorado
  11. 1.8 2 km NNW of El Jebel, Colorado
  12. 1.7 15 km NW of Dotsero, Colorado
  13. 1.7 11 km NE of Battlement Mesa, Colorado
  14. 2.4 19 km NNE of Chacra, Colorado
  15. 1.5 5 km SSW of Carbondale, 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.