QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

3 km SW of Alcoa, Tennessee

· 22 km deep · released about 79 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blount County 12 kmKnox County 25 kmLoudon County 28 kmAnderson County 42 kmMonroe County 42 kmSevier County 43 kmRoane County 48 kmGraham County 50 kmSwain County 54 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
22 km below the surface
Felt
no reports yet
Nearest
Blount County, 12 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1903 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 79 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 5.8 190,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 79 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 35.7710, -84.0045. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blount County, TN 12 km (7 mi) NW of here earthquakes near Blount County
Knox County, TN 25 km (16 mi) SSW of here earthquakes near Knox County
Loudon County, TN 28 km (18 mi) E of here earthquakes near Loudon County
Anderson County, TN 42 km (26 mi) SSE of here earthquakes near Anderson County
Monroe County, TN 42 km (26 mi) NNE of here earthquakes near Monroe County
Sevier County, TN 43 km (27 mi) W of here earthquakes near Sevier County

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

Aftershocks so far

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

  1. 2.1 Tennessee
  2. 2.2 1 km S of Garland, Tennessee
  3. 2.7 3 km S of Blaine, Tennessee
  4. 2.0 3 km ESE of Vonore, Tennessee
  5. 1.8 4 km SSW of Loudon, Tennessee
  6. 2.0 3 km SSW of Maryville, Tennessee
  7. 2.0 Tennessee
  8. 2.1 5 km S of Greenback, Tennessee
  9. 1.8 6 km NNW of Farragut, Tennessee
  10. 2.5 Tennessee
  11. 1.7 3 km NE of Greenback, Tennessee
  12. 1.8 Tennessee
  13. 1.8 4 km NE of Vonore, Tennessee
  14. 2.2 4 km ENE of Madisonville, Tennessee
  15. 1.8 4 km SW of Sweetwater, 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.