QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1mw

21 km SE of Greenback, Tennessee

· 25 km deep · released about 21 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blount County 17 kmGraham County 26 kmMonroe County 26 kmLoudon County 36 kmCherokee County 46 kmSwain County 47 kmSevier County 50 kmKnox County 50 kmClay County 59 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 4.1 (mw)
Depth
25 km below the surface
Felt
45935 reports · strongest reported intensity V
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
Blount County, 17 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 51 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 45935 people have reported feeling it to USGS.

How big was it?

This earthquake released about 21 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 7,900× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 350× the energy of this one
  3. Magna, Utah 2020 M 5.7 250× the energy of this one
  4. This earthquake M 4.1 about 21 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 45× more

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 35.5450, -83.9868. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blount County, TN 17 km (11 mi) SSW of here earthquakes near Blount County
Graham County, NC 26 km (16 mi) NNW of here earthquakes near Graham County
Monroe County, TN 26 km (16 mi) ENE of here earthquakes near Monroe County
Loudon County, TN 36 km (23 mi) SE of here earthquakes near Loudon County
Cherokee County, NC 46 km (28 mi) N of here earthquakes near Cherokee County
Swain County, NC 47 km (29 mi) W of here earthquakes near Swain County

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

Aftershocks so far

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

  1. 2.0 2 km SW of Vonore, Tennessee
  2. 2.4 2 km SW of Vonore, Tennessee
  3. 1.5 12 km SE of Greenback, Tennessee
  4. 2.0 3 km ESE of Tellico Village, Tennessee
  5. 1.8 0 km SE of Farragut, Tennessee
  6. 2.4 5 km E of Etowah, Tennessee
  7. 2.3 1 km S of Friendsville, Tennessee
  8. 1.8 5 km SSE of Friendsville, Tennessee
  9. 2.4 5 km SSE of Friendsville, Tennessee
  10. 1.7 4 km NE of Louisville, Tennessee
  11. 2.0 3 km WSW of Alcoa, Tennessee
  12. 2.2 3 km WSW of Alcoa, Tennessee
  13. 2.2 10 km WNW of Lake Santeetlah, North Carolina
  14. 1.8 11 km S of Tellico Plains, Tennessee
  15. 2.1 5 km S of Sweetwater, 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.