QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

5 km NE of Greenback, Tennessee

· 11 km deep · released about 88 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loudon County 18 kmBlount County 18 kmMonroe County 29 kmKnox County 38 kmRoane County 40 kmGraham County 46 kmAnderson County 48 kmMcMinn County 53 kmSevier County 55 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 2.3 (md)
Depth
11 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Loudon County, 18 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2103 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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 35.6887, -84.1275. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loudon County, TN 18 km (11 mi) ESE of here earthquakes near Loudon County
Blount County, TN 18 km (11 mi) W of here earthquakes near Blount County
Monroe County, TN 29 km (18 mi) NNE of here earthquakes near Monroe County
Knox County, TN 38 km (24 mi) SSW of here earthquakes near Knox County
Roane County, TN 40 km (25 mi) ESE of here earthquakes near Roane County
Graham County, NC 46 km (29 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

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

  1. 2.3 1 km NNW of Wildwood, Tennessee
  2. 2.1 2 km NW of Wildwood, Tennessee
  3. 2.1 1 km SW of Tellico Village, Tennessee
  4. 1.9 6 km NW of Lenoir City, Tennessee
  5. 2.6 9 km ENE of Garland, Tennessee
  6. 2.4 6 km WNW of Niota, Tennessee
  7. 1.6 2 km ENE of Loudon, Tennessee
  8. 1.8 6 km NW of Vonore, Tennessee
  9. 1.8 5 km SSW of Tellico Village, Tennessee
  10. 1.5 12 km ESE of Madisonville, Tennessee
  11. 2.4 7 km NNE of Garland, Tennessee
  12. 1.6 7 km ESE of Vonore, Tennessee
  13. 1.7 6 km E of Townsend, Tennessee
  14. 2.5 Tennessee-North Carolina border region
  15. 2.7 19 km NNW of Lake Santeetlah, North Carolina

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.