QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

11 km WNW of Rico, Colorado

· 5.0 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dolores County 30 kmSan Miguel County 40 kmSan Juan County 44 kmLa Plata County 55 kmMontezuma County 57 kmOuray County 59 kmHinsdale County 69 kmMontrose County 78 kmMineral County 104 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 2.9 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Dolores County, 30 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3127 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 37.7155, -108.1605. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dolores County, CO 30 km (19 mi) E of here earthquakes near Dolores County
San Miguel County, CO 40 km (25 mi) SE of here earthquakes near San Miguel County
San Juan County, CO 44 km (27 mi) W of here earthquakes near San Juan County
La Plata County, CO 55 km (34 mi) NNW of here earthquakes near La Plata County
Montezuma County, CO 57 km (35 mi) NE of here earthquakes near Montezuma County
Ouray County, CO 59 km (36 mi) SW of here earthquakes near Ouray 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. 2.6 15 km SSW of Sawpit, Colorado
  2. 2.0 6 km NW of Rico, Colorado
  3. 2.1 14 km S of Ophir, Colorado
  4. 2.2 16 km S of Ophir, Colorado
  5. 3.6 16 km S of Ophir, Colorado
  6. 1.7 4 km WSW of Silverton, Colorado
  7. 1.6 19 km WNW of Rico, Colorado
  8. 3.1 14 km NNW of Rico, Colorado
  9. 2.5 14 km NNW of Rico, 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.