QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

4 km WSW of Seymour, Tennessee

· 3.7 km deep · released about 88 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Knox County 19 kmSevier County 24 kmBlount County 26 kmJefferson County 35 kmSwain County 44 kmUnion County 45 kmAnderson County 46 kmGrainger County 50 kmLoudon County 52 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
3.7 km below the surface
Felt
15 reports · strongest reported intensity IV
Nearest
Knox County, 19 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2780 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 15 people have reported feeling it to USGS.

How big was it?

This earthquake released about 88 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 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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 35.8828, -83.7698. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Knox County, TN 19 km (12 mi) SE of here earthquakes near Knox County
Sevier County, TN 24 km (15 mi) WNW of here earthquakes near Sevier County
Blount County, TN 26 km (16 mi) NNE of here earthquakes near Blount County
Jefferson County, TN 35 km (22 mi) WSW of here earthquakes near Jefferson County
Swain County, NC 44 km (28 mi) NW of here earthquakes near Swain County
Union County, TN 45 km (28 mi) S of here earthquakes near Union County

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

Aftershocks so far

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

  1. 2.5 11 km WNW of Rutledge, Tennessee
  2. 2.0 7 km NE of Rockford, Tennessee
  3. 2.1 7 km NNW of New Market, Tennessee
  4. 1.8 6 km NW of Mascot, Tennessee
  5. 1.6 3 km NE of Greenback, Tennessee
  6. 1.7 5 km E of Greenback, Tennessee
  7. 1.9 2 km S of Knoxville, Tennessee
  8. 2.2 4 km E of Maryville, Tennessee
  9. 2.0 4 km ESE of Huntsville, Tennessee
  10. 2.2 5 km ENE of Wildwood, Tennessee
  11. 2.3 1 km ESE of Farragut, Tennessee
  12. 2.2 3 km SSW of Garland, Tennessee
  13. 2.4 0 km SSW of Rockford, Tennessee
  14. 1.7 5 km WNW of Sevierville, Tennessee
  15. 2.2 5 km W of Sevierville, 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.