QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

16 km S of Ophir, Colorado

· 6.9 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 17 kmHinsdale County 42 kmLa Plata County 47 kmOuray County 49 kmDolores County 58 kmSan Miguel County 61 kmMineral County 76 kmMontezuma County 78 kmMontrose County 86 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 3.6 (ml)
Depth
6.9 km below the surface
Felt
39 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
San Juan County, 17 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 718 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 39 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.9× more

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 37.7120, -107.8469. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, CO 17 km (11 mi) WSW of here earthquakes near San Juan County
Hinsdale County, CO 42 km (26 mi) WSW of here earthquakes near Hinsdale County
La Plata County, CO 47 km (29 mi) N of here earthquakes near La Plata County
Ouray County, CO 49 km (31 mi) S of here earthquakes near Ouray County
Dolores County, CO 58 km (36 mi) E of here earthquakes near Dolores County
San Miguel County, CO 61 km (38 mi) ESE of here earthquakes near San Miguel 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. 2.6 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

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.