QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km NNE of Oak Ridge, Tennessee

· 20 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Anderson County 7 kmKnox County 28 kmRoane County 36 kmMorgan County 37 kmLoudon County 37 kmCampbell County 38 kmUnion County 43 kmScott County 47 kmBlount County 50 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 1.8 (md)
Depth
20 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Anderson County, 7 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1476 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 36.0650, -84.2350. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Anderson County, TN 7 km (4 mi) SSW of here earthquakes near Anderson County
Knox County, TN 28 km (17 mi) WNW of here earthquakes near Knox County
Roane County, TN 36 km (22 mi) NE of here earthquakes near Roane County
Morgan County, TN 37 km (23 mi) ESE of here earthquakes near Morgan County
Loudon County, TN 37 km (23 mi) N of here earthquakes near Loudon County
Campbell County, TN 38 km (24 mi) S of here earthquakes near Campbell County

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

Aftershocks so far

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

  1. 1.7 5 km NE of Greenback, Tennessee
  2. 1.8 5 km SW of Maryville, Tennessee
  3. 2.2 10 km WNW of Philadelphia, Tennessee
  4. 2.4 3 km WNW of Friendsville, Tennessee
  5. 1.8 3 km E of Philadelphia, Tennessee
  6. 2.2 13 km S of Midtown, Tennessee
  7. 2.0 3 km WNW of Huntsville, Tennessee
  8. 1.5 2 km W of Maryville, Tennessee
  9. 2.1 0 km N of Greenback, Tennessee
  10. 1.9 1 km ENE of Friendsville, Tennessee
  11. 2.6 2 km E of Greenback, Tennessee
  12. 2.0 8 km ENE of Knoxville, Tennessee
  13. 2.3 10 km S of Jellico, Tennessee
  14. 2.1 0 km S of Loudon, Tennessee
  15. 2.0 8 km W of Seymour, 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.