QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

2 km SSW of Greenback, Tennessee

· 20 km deep · released about 58 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loudon County 16 kmMonroe County 22 kmBlount County 24 kmRoane County 38 kmKnox County 45 kmGraham County 45 kmMcMinn County 46 kmAnderson County 53 kmCherokee County 57 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 2.2 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Loudon County, 16 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 191 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 58 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 260,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 58 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 35.6402, -84.1822. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loudon County, TN 16 km (10 mi) SE of here earthquakes near Loudon County
Monroe County, TN 22 km (14 mi) NNE of here earthquakes near Monroe County
Blount County, TN 24 km (15 mi) WSW of here earthquakes near Blount County
Roane County, TN 38 km (24 mi) SE of here earthquakes near Roane County
Knox County, TN 45 km (28 mi) SSW of here earthquakes near Knox County
Graham County, NC 45 km (28 mi) NW of here earthquakes near Graham County

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

Aftershocks so far

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

  1. 2.1 5 km NNE of Greenback, Tennessee
  2. 2.0 1 km S of Tellico Village, Tennessee
  3. 2.1 1 km S of Tellico Village, Tennessee
  4. 1.7 1 km ENE of Sweetwater, Tennessee
  5. 1.8 11 km NNE of Decatur, Tennessee
  6. 2.0 3 km SW of Tellico Village, Tennessee
  7. 1.6 8 km E of Englewood, Tennessee
  8. 1.8 8 km E of Englewood, Tennessee
  9. 2.2 9 km S of Oak Ridge, Tennessee
  10. 2.3 17 km SSW of Tellico Plains, Tennessee
  11. 1.7 6 km WNW of Sweetwater, Tennessee
  12. 2.0 2 km SW of Vonore, Tennessee
  13. 2.4 2 km SW of Vonore, Tennessee
  14. 1.5 12 km SE of Greenback, Tennessee
  15. 2.0 3 km ESE of Tellico Village, Tennessee

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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2018-12-12 — it released about 2,100 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.