QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

6 km E of Friendsville, Tennessee

· 12 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blount County 16 kmLoudon County 22 kmKnox County 28 kmMonroe County 39 kmAnderson County 40 kmRoane County 42 kmSevier County 49 kmGraham County 51 kmSwain 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 2.1 (md)
Depth
12 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Blount County, 16 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 725 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 35.7675, -84.0693. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blount County, TN 16 km (10 mi) NW of here earthquakes near Blount County
Loudon County, TN 22 km (14 mi) E of here earthquakes near Loudon County
Knox County, TN 28 km (17 mi) SSW of here earthquakes near Knox County
Monroe County, TN 39 km (24 mi) NNE of here earthquakes near Monroe County
Anderson County, TN 40 km (25 mi) SSE of here earthquakes near Anderson County
Roane County, TN 42 km (26 mi) ESE of here earthquakes near Roane 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 21 km SE of Greenback, Tennessee
  2. 1.8 2 km WNW of Maryville, Tennessee
  3. 1.8 0 km ESE of Knoxville, Tennessee
  4. 1.6 5 km WSW of Friendsville, Tennessee
  5. 2.2 10 km ENE of Knoxville, Tennessee
  6. 1.7 5 km NE of Greenback, Tennessee
  7. 1.8 5 km SW of Maryville, Tennessee
  8. 2.2 10 km WNW of Philadelphia, Tennessee
  9. 2.0 6 km ENE of Niota, Tennessee
  10. 2.4 3 km WNW of Friendsville, Tennessee
  11. 1.8 3 km E of Philadelphia, Tennessee
  12. 2.2 13 km S of Midtown, Tennessee
  13. 1.6 10 km ENE of Tellico Plains, Tennessee
  14. 1.7 5 km ENE of Niota, Tennessee
  15. 2.0 3 km WNW of Huntsville, 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.