QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

8 km WSW of Petros, Tennessee

· 5.5 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Morgan County 14 kmRoane County 23 kmAnderson County 30 kmLoudon County 40 kmScott County 41 kmCumberland County 44 kmCampbell County 50 kmFentress County 51 kmKnox 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 1.9 (md)
Depth
5.5 km below the surface
Felt
no reports yet
Nearest
Morgan County, 14 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2314 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 36.0578, -84.5195. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Morgan County, TN 14 km (9 mi) SE of here earthquakes near Morgan County
Roane County, TN 23 km (15 mi) N of here earthquakes near Roane County
Anderson County, TN 30 km (19 mi) WSW of here earthquakes near Anderson County
Loudon County, TN 40 km (25 mi) NNW of here earthquakes near Loudon County
Scott County, TN 41 km (26 mi) S of here earthquakes near Scott County
Cumberland County, TN 44 km (28 mi) ENE of here earthquakes near Cumberland County

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

Aftershocks so far

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

  1. 2.2 9 km W of Clinton, Tennessee
  2. 2.1 6 km WSW of Tellico Village, Tennessee
  3. 2.2 1 km S of Garland, Tennessee
  4. 1.8 4 km SSW of Loudon, Tennessee
  5. 2.5 9 km WSW of Oakdale, Tennessee
  6. 1.8 6 km NNW of Farragut, Tennessee
  7. 2.5 2 km N of Farragut, Tennessee
  8. 1.5 6 km NNW of Philadelphia, Tennessee
  9. 1.8 6 km NNE of Oak Ridge, Tennessee
  10. 1.9 15 km WNW of Sweetwater, Tennessee
  11. 2.1 1 km SW of Tellico Village, Tennessee
  12. 1.9 6 km NW of Lenoir City, Tennessee
  13. 2.6 9 km ENE of Garland, Tennessee
  14. 1.6 2 km ENE of Loudon, Tennessee
  15. 2.4 7 km NNE of Garland, 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.