QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

2 km NE of Greenback, Tennessee

· 11 km deep · released about 94 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loudon County 16 kmBlount County 21 kmMonroe County 27 kmRoane County 38 kmKnox County 40 kmGraham County 47 kmAnderson County 49 kmMcMinn County 51 kmSevier County 58 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
5 reports · strongest reported intensity IV
Nearest
Loudon County, 16 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 505 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 94 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 5.8 160,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 110,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 94 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 35.6800, -84.1512. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loudon County, TN 16 km (10 mi) ESE of here earthquakes near Loudon County
Blount County, TN 21 km (13 mi) W of here earthquakes near Blount County
Monroe County, TN 27 km (17 mi) NNE of here earthquakes near Monroe County
Roane County, TN 38 km (24 mi) ESE of here earthquakes near Roane County
Knox County, TN 40 km (25 mi) SSW of here earthquakes near Knox County
Graham County, NC 47 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

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

  1. 1.9 7 km ENE of Etowah, Tennessee
  2. 1.9 7 km ENE of Etowah, Tennessee
  3. 2.0 21 km SE of Greenback, Tennessee
  4. 1.8 2 km WNW of Maryville, Tennessee
  5. 1.8 0 km ESE of Knoxville, Tennessee
  6. 1.6 5 km WSW of Friendsville, Tennessee
  7. 2.2 10 km ENE of Knoxville, Tennessee
  8. 1.7 5 km NE of Greenback, Tennessee
  9. 1.8 5 km SW of Maryville, Tennessee
  10. 2.2 10 km WNW of Philadelphia, Tennessee
  11. 2.0 6 km ENE of Niota, Tennessee
  12. 2.4 3 km WNW of Friendsville, Tennessee
  13. 1.8 3 km E of Philadelphia, Tennessee
  14. 2.2 13 km S of Midtown, Tennessee
  15. 1.6 10 km ENE of Tellico Plains, 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.

On USGS

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