QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

8 km W of Oak Creek, Colorado

· 5.0 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Routt County 23 kmJackson County 75 kmEagle County 79 kmGrand County 83 kmRio Blanco County 103 kmMoffat County 105 kmGarfield County 105 kmSummit County 108 kmPitkin County 119 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
Routt County, 23 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2725 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 40.2804, -107.0601. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Routt County, CO 23 km (15 mi) SSW of here earthquakes near Routt County
Jackson County, CO 75 km (47 mi) SW of here earthquakes near Jackson County
Eagle County, CO 79 km (49 mi) NNW of here earthquakes near Eagle County
Grand County, CO 83 km (51 mi) WNW of here earthquakes near Grand County
Rio Blanco County, CO 103 km (64 mi) ENE of here earthquakes near Rio Blanco County
Moffat County, CO 105 km (65 mi) ESE of here earthquakes near Moffat 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. 2.0 17 km WSW of Phippsburg, Colorado
  2. 1.9 26 km WSW of Yampa, Colorado
  3. 2.0 29 km WSW of Yampa, Colorado
  4. 2.5 30 km NNW of Dotsero, Colorado
  5. 2.3 13 km NW of Steamboat Springs, Colorado
  6. 2.0 16 km WNW of Steamboat Springs, Colorado
  7. 3.1 21 km NW of Steamboat Springs, Colorado
  8. 1.5 15 km WNW of Steamboat Springs, Colorado
  9. 2.5 5 km SSE of Craig, Colorado
  10. 2.4 Colorado
  11. 2.2 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.