QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

8 km ENE of Seymour, Tennessee

· 8.5 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sevier County 19 kmJefferson County 22 kmKnox County 28 kmBlount County 37 kmGrainger County 41 kmSwain County 43 kmUnion County 43 kmHamblen County 47 kmCocke County 47 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
8.5 km below the surface
Felt
no reports yet
Nearest
Sevier County, 19 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 563 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 46 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 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 35.9287, -83.6413. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sevier County, TN 19 km (12 mi) NW of here earthquakes near Sevier County
Jefferson County, TN 22 km (14 mi) SW of here earthquakes near Jefferson County
Knox County, TN 28 km (17 mi) ESE of here earthquakes near Knox County
Blount County, TN 37 km (23 mi) NE of here earthquakes near Blount County
Grainger County, TN 41 km (25 mi) SSW of here earthquakes near Grainger County
Swain County, NC 43 km (27 mi) NNW of here earthquakes near Swain County

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

Aftershocks so far

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

  1. 2.3 1 km W of Rutledge, Tennessee
  2. 2.0 4 km WNW of Mascot, Tennessee
  3. 1.9 3 km NW of Mascot, Tennessee
  4. 1.8 0 km SE of Farragut, Tennessee
  5. 2.3 1 km S of Friendsville, Tennessee
  6. 1.8 5 km SSE of Friendsville, Tennessee
  7. 2.4 5 km SSE of Friendsville, Tennessee
  8. 1.7 4 km NE of Louisville, Tennessee
  9. 2.0 3 km WSW of Alcoa, Tennessee
  10. 2.2 3 km WSW of Alcoa, Tennessee
  11. 2.3 4 km N of Pigeon Forge, Tennessee
  12. 1.8 8 km NNW of Bryson City, North Carolina
  13. 2.1 2 km S of Blaine, Tennessee
  14. 2.1 7 km SE of Knoxville, Tennessee
  15. 1.9 5 km NNW of Mascot, 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

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