QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km WSW of Maryville, Tennessee

· 11 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blount County 13 kmLoudon County 24 kmKnox County 30 kmMonroe County 37 kmAnderson County 44 kmRoane County 45 kmSevier County 47 kmGraham County 48 kmSwain County 56 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
11 km below the surface
Felt
7 reports · strongest reported intensity II
Nearest
Blount County, 13 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2806 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 40 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 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 35.7407, -84.0478. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blount County, TN 13 km (8 mi) WNW of here earthquakes near Blount County
Loudon County, TN 24 km (15 mi) E of here earthquakes near Loudon County
Knox County, TN 30 km (18 mi) SSW of here earthquakes near Knox County
Monroe County, TN 37 km (23 mi) NNE of here earthquakes near Monroe County
Anderson County, TN 44 km (27 mi) SSE of here earthquakes near Anderson County
Roane County, TN 45 km (28 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

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

  1. 1.6 8 km SSE of Vonore, Tennessee
  2. 1.7 6 km WSW of Tellico Village, Tennessee
  3. 1.7 11 km WNW of Loudon, Tennessee
  4. 2.2 3 km SSW of Garland, Tennessee
  5. 2.4 0 km SSW of Rockford, Tennessee
  6. 2.1 4 km NW of Tellico Plains, Tennessee
  7. 1.7 5 km NW of Tellico Plains, Tennessee
  8. 1.9 6 km SW of Tellico Village, Tennessee
  9. 1.7 5 km WNW of Sevierville, Tennessee
  10. 2.2 5 km W of Sevierville, Tennessee
  11. 2.1 9 km ESE of Vonore, Tennessee
  12. 2.0 11 km ESE of Vonore, Tennessee
  13. 1.7 4 km WNW of Madisonville, Tennessee
  14. 2.6 2 km SSE of Mascot, Tennessee
  15. 1.7 11 km ESE of Madisonville, 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.