QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

20 km WNW of Delta, Colorado

· 6.4 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mesa County 27 kmDelta County 38 kmMontrose County 45 kmOuray County 85 kmSan Miguel County 90 kmGarfield County 94 kmGunnison County 108 kmGrand County 112 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
6.4 km below the surface
Felt
no reports yet
Nearest
Mesa County, 27 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1876 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 38.8096, -108.2946. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mesa County, CO 27 km (17 mi) SSE of here earthquakes near Mesa County
Delta County, CO 38 km (23 mi) W of here earthquakes near Delta County
Montrose County, CO 45 km (28 mi) N of here earthquakes near Montrose County
Ouray County, CO 85 km (53 mi) NNW of here earthquakes near Ouray County
San Miguel County, CO 90 km (56 mi) N of here earthquakes near San Miguel County
Garfield County, CO 94 km (58 mi) SSW of here earthquakes near Garfield County

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

Aftershocks so far

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

  1. 2.3 15 km WSW of Collbran, Colorado
  2. 3.2 34 km W of Delta, Colorado
  3. 1.9 19 km SSE of Orchard Mesa, Colorado
  4. 1.9 34 km W of Delta, Colorado
  5. 1.7 20 km SSW of Orchard Mesa, Colorado
  6. 2.0 15 km ENE of Palisade, 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.