QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

10 km ENE of Knoxville, Tennessee

· 8.9 km deep · released about 52 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Knox County 11 kmUnion County 33 kmJefferson County 34 kmSevier County 35 kmBlount County 35 kmAnderson County 37 kmGrainger County 42 kmLoudon County 53 kmCampbell County 55 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 2.2 (md)
Depth
8.9 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Knox County, 11 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 207 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 52 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 35.9903, -83.8160. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Knox County, TN 11 km (7 mi) E of here earthquakes near Knox County
Union County, TN 33 km (20 mi) S of here earthquakes near Union County
Jefferson County, TN 34 km (21 mi) W of here earthquakes near Jefferson County
Sevier County, TN 35 km (21 mi) NW of here earthquakes near Sevier County
Blount County, TN 35 km (22 mi) NNE of here earthquakes near Blount County
Anderson County, TN 37 km (23 mi) ESE of here earthquakes near Anderson County

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

Aftershocks so far

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

  1. 2.1 5 km NNE of Greenback, Tennessee
  2. 2.2 9 km S of Oak Ridge, Tennessee
  3. 2.3 1 km W of Rutledge, Tennessee
  4. 1.5 12 km SE of Greenback, Tennessee
  5. 2.0 4 km WNW of Mascot, Tennessee
  6. 1.9 3 km NW of Mascot, Tennessee
  7. 1.8 0 km SE of Farragut, Tennessee
  8. 2.3 1 km S of Friendsville, Tennessee
  9. 1.8 5 km SSE of Friendsville, Tennessee
  10. 2.4 5 km SSE of Friendsville, Tennessee
  11. 1.7 4 km NE of Louisville, Tennessee
  12. 2.0 3 km WSW of Alcoa, Tennessee
  13. 2.2 3 km WSW of Alcoa, Tennessee
  14. 2.3 4 km N of Pigeon Forge, Tennessee
  15. 2.1 2 km S of Blaine, 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.