QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

4 km WSW of Silverton, Colorado

· 5.0 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 4 kmHinsdale County 29 kmOuray County 40 kmLa Plata County 58 kmSan Miguel County 67 kmMineral County 68 kmDolores County 70 kmMontrose County 83 kmArchuleta County 89 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 1.7 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
San Juan County, 4 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2416 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 37.8028, -107.7107. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, CO 4 km (3 mi) NW of here earthquakes near San Juan County
Hinsdale County, CO 29 km (18 mi) W of here earthquakes near Hinsdale County
Ouray County, CO 40 km (25 mi) S of here earthquakes near Ouray County
La Plata County, CO 58 km (36 mi) N of here earthquakes near La Plata County
San Miguel County, CO 67 km (42 mi) ESE of here earthquakes near San Miguel County
Mineral County, CO 68 km (42 mi) WNW of here earthquakes near Mineral County

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

Aftershocks so far

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

  1. 2.6 15 km SSW of Sawpit, Colorado
  2. 2.5 12 km SE of Silverton, Colorado
  3. 2.0 6 km NW of Rico, Colorado
  4. 1.8 16 km WSW of Loghill Village, Colorado
  5. 2.1 14 km S of Ophir, Colorado
  6. 2.2 16 km S of Ophir, Colorado
  7. 3.6 16 km S of Ophir, Colorado
  8. 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.