QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

16 km S of Cotopaxi, Colorado

· 5.0 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 30 kmFremont County 35 kmSaguache County 52 kmAlamosa County 73 kmChaffee County 78 kmTeller County 84 kmHuerfano County 87 kmPark County 100 kmPueblo County 105 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 1.9 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Custer County, 30 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2248 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 38.2192, -105.6844. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, CO 30 km (19 mi) WNW of here earthquakes near Custer County
Fremont County, CO 35 km (22 mi) SW of here earthquakes near Fremont County
Saguache County, CO 52 km (33 mi) ENE of here earthquakes near Saguache County
Alamosa County, CO 73 km (45 mi) N of here earthquakes near Alamosa County
Chaffee County, CO 78 km (49 mi) SE of here earthquakes near Chaffee County
Teller County, CO 84 km (52 mi) SSW of here earthquakes near Teller 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. 2.4 17 km NE of Saguache, Colorado
  2. 2.5 19 km WNW of Cañon City, Colorado
  3. 1.5 9 km N of Cotopaxi, Colorado
  4. 1.5 2 km SSE of Cotopaxi, Colorado
  5. 2.3 3 km SW of Cotopaxi, Colorado
  6. 1.5 2 km S of Coaldale, 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.