QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

27 km W of Delta, Colorado

· 5.0 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mesa County 29 kmMontrose County 41 kmDelta County 46 kmSan Miguel County 84 kmOuray County 86 kmGarfield County 101 kmGrand County 105 kmDolores County 115 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 1.8 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Mesa County, 29 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2398 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 38.7654, -108.3862. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mesa County, CO 29 km (18 mi) SSE of here earthquakes near Mesa County
Montrose County, CO 41 km (26 mi) NNW of here earthquakes near Montrose County
Delta County, CO 46 km (29 mi) WSW of here earthquakes near Delta County
San Miguel County, CO 84 km (52 mi) N of here earthquakes near San Miguel County
Ouray County, CO 86 km (53 mi) NW of here earthquakes near Ouray County
Garfield County, CO 101 km (63 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

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

  1. 3.2 34 km W of Delta, Colorado
  2. 1.9 19 km SSE of Orchard Mesa, Colorado
  3. 1.9 34 km W of Delta, Colorado
  4. 1.7 20 km SSW of Orchard Mesa, Colorado
  5. 2.0 15 km ENE of Palisade, Colorado
  6. 2.1 20 km WNW of Delta, Colorado
  7. 2.5 26 km WNW of Delta, Colorado
  8. 1.7 29 km SW of Orchard Mesa, Colorado
  9. 1.5 19 km WSW of Redlands, 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.