QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

6 km SW of Maryville, Tennessee

· 9.9 km deep · released about 77 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blount County 9 kmLoudon County 27 kmKnox County 32 kmMonroe County 36 kmGraham County 44 kmSevier County 45 kmAnderson County 47 kmRoane County 48 kmSwain County 53 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
9.9 km below the surface
Felt
3 reports · strongest reported intensity IV
Nearest
Blount County, 9 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. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 77 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 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 77 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 35.7163, -84.0188. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blount County, TN 9 km (6 mi) WNW of here earthquakes near Blount County
Loudon County, TN 27 km (17 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 (23 mi) NE of here earthquakes near Monroe County
Graham County, NC 44 km (28 mi) NNW of here earthquakes near Graham County
Sevier County, TN 45 km (28 mi) W of here earthquakes near Sevier County

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

Aftershocks so far

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

  1. 2.2 2 km SSW of Greenback, Tennessee
  2. 1.8 13 km SSE of Greenback, Tennessee
  3. 1.8 4 km E of Madisonville, Tennessee
  4. 2.5 5 km E of Madisonville, Tennessee
  5. 2.1 7 km SE of Knoxville, Tennessee
  6. 1.9 5 km NNW of Mascot, Tennessee
  7. 2.0 5 km NNW of Vonore, Tennessee
  8. 1.9 9 km WSW of Mascot, Tennessee
  9. 2.2 10 km WNW of Philadelphia, Tennessee
  10. 2.2 13 km SE of Greenback, Tennessee
  11. 2.0 21 km SE of Greenback, Tennessee
  12. 1.8 2 km WNW of Maryville, Tennessee
  13. 1.8 0 km ESE of Knoxville, Tennessee
  14. 1.6 5 km WSW of Friendsville, Tennessee
  15. 2.2 10 km ENE of Knoxville, 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.