QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km W of Alcoa, Tennessee

· 9.4 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blount County 13 kmKnox County 24 kmLoudon County 29 kmAnderson County 41 kmSevier County 43 kmMonroe County 44 kmRoane County 48 kmGraham County 51 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 2.1 (md)
Depth
9.4 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Blount County, 13 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2543 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 35.7863, -84.0022. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blount County, TN 13 km (8 mi) NNW of here earthquakes near Blount County
Knox County, TN 24 km (15 mi) SSW of here earthquakes near Knox County
Loudon County, TN 29 km (18 mi) ENE of here earthquakes near Loudon County
Anderson County, TN 41 km (25 mi) SSE of here earthquakes near Anderson County
Sevier County, TN 43 km (27 mi) W of here earthquakes near Sevier County
Monroe County, TN 44 km (27 mi) NNE of here earthquakes near Monroe County

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

Aftershocks so far

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

  1. 2.0 3 km SSW of Garland, Tennessee
  2. 1.6 7 km WSW of Tellico Village, Tennessee
  3. 2.3 5 km NE of Greenback, Tennessee
  4. 2.3 0 km SW of Knoxville, Tennessee
  5. 1.6 3 km ENE of Philadelphia, Tennessee
  6. 2.5 11 km SSW of Maryville, Tennessee
  7. 2.3 7 km W of New Market, Tennessee
  8. 2.5 7 km SE of Maryville, Tennessee
  9. 2.0 3 km SSW of Loudon, Tennessee
  10. 2.1 6 km S of Sweetwater, Tennessee
  11. 2.0 Kentucky-Tennessee border region
  12. 2.6 7 km ENE of Seymour, Tennessee
  13. 2.4 8 km ENE of Seymour, Tennessee
  14. 1.9 Tennessee
  15. 1.5 4 km WSW 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.

On USGS

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