QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km ESE of Woody Creek, Colorado

· 5.0 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pitkin County 8 kmLake County 42 kmEagle County 43 kmGunnison County 68 kmSummit County 72 kmChaffee County 74 kmPark County 98 kmDelta County 99 kmGarfield County 100 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 1.8 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Pitkin County, 8 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2570 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 39.2590, -106.8362. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pitkin County, CO 8 km (5 mi) NE of here earthquakes near Pitkin County
Lake County, CO 42 km (26 mi) W of here earthquakes near Lake County
Eagle County, CO 43 km (27 mi) SSW of here earthquakes near Eagle County
Gunnison County, CO 68 km (42 mi) NNE of here earthquakes near Gunnison County
Summit County, CO 72 km (45 mi) WSW of here earthquakes near Summit County
Chaffee County, CO 74 km (46 mi) NW of here earthquakes near Chaffee County

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

Aftershocks so far

15 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. 1.8 2 km NNW of El Jebel, 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. 1.6 2 km ESE of Twin Lakes, Colorado
  9. 1.5 5 km SSW of Carbondale, Colorado
  10. 2.4 9 km NW of Mount Crested Butte, Colorado
  11. 1.9 10 km SE of Crystal, Colorado
  12. 2.1 3 km NNW of Mount Crested Butte, Colorado
  13. 1.9 10 km NNW of Mount Crested Butte, Colorado
  14. 1.6 Colorado
  15. 1.6 3 km WNW 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.