QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km SW of Maryville, Tennessee

· 23 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blount County 11 kmLoudon County 25 kmKnox County 32 kmMonroe County 36 kmGraham County 45 kmRoane County 46 kmSevier County 47 kmAnderson County 47 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
23 km below the surface
Felt
no reports yet
Nearest
Blount County, 11 km ESE
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.

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 35.7188, -84.0338. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blount County, TN 11 km (7 mi) WNW of here earthquakes near Blount County
Loudon County, TN 25 km (16 mi) E of here earthquakes near Loudon County
Knox County, TN 32 km (20 mi) SSW of here earthquakes near Knox County
Monroe County, TN 36 km (22 mi) NNE of here earthquakes near Monroe County
Graham County, NC 45 km (28 mi) NNW of here earthquakes near Graham County
Roane County, TN 46 km (29 mi) ESE of here earthquakes near Roane County

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

Aftershocks so far

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

  1. 2.2 10 km ENE of Knoxville, Tennessee
  2. 1.7 5 km NE of Greenback, Tennessee
  3. 1.8 5 km SW of Maryville, Tennessee
  4. 2.2 10 km WNW of Philadelphia, Tennessee
  5. 2.0 6 km ENE of Niota, Tennessee
  6. 2.4 3 km WNW of Friendsville, Tennessee
  7. 1.8 3 km E of Philadelphia, Tennessee
  8. 1.6 10 km ENE of Tellico Plains, Tennessee
  9. 1.7 5 km ENE of Niota, Tennessee
  10. 2.0 3 km WNW of Huntsville, Tennessee
  11. 1.5 2 km W of Maryville, Tennessee
  12. 2.1 0 km N of Greenback, Tennessee
  13. 2.1 3 km NE of Niota, Tennessee
  14. 1.9 5 km SSW of Sweetwater, Tennessee
  15. 2.3 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.