QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

9 km SSE of Rockwood, Tennessee

· 24 km deep · released about 400 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Roane County 13 kmLoudon County 30 kmMeigs County 34 kmRhea County 34 kmCumberland County 37 kmMorgan County 39 kmMcMinn County 40 kmMonroe County 52 kmAnderson County 55 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 2.8 (md)
Depth
24 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Roane County, 13 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2834 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 38,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 27,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.4× the energy of this one
  4. This earthquake M 2.8 about 400 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 35.7848, -84.6450. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Roane County, TN 13 km (8 mi) WSW of here earthquakes near Roane County
Loudon County, TN 30 km (19 mi) W of here earthquakes near Loudon County
Meigs County, TN 34 km (21 mi) NNE of here earthquakes near Meigs County
Rhea County, TN 34 km (21 mi) NE of here earthquakes near Rhea County
Cumberland County, TN 37 km (23 mi) ESE of here earthquakes near Cumberland County
Morgan County, TN 39 km (24 mi) S of here earthquakes near Morgan County

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

Aftershocks so far

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

  1. 2.2 10 km SE of Dayton, Tennessee
  2. 1.7 2 km NE of Tellico Village, Tennessee
  3. 2.1 2 km ESE of Tellico Village, Tennessee
  4. 2.2 2 km ESE of Tellico Village, Tennessee
  5. 2.3 1 km E of Tellico Village, Tennessee
  6. 1.7 3 km S of Huntsville, Tennessee
  7. 1.7 1 km N of Decatur, Tennessee
  8. 2.3 2 km NE of Tellico Village, Tennessee
  9. 2.2 9 km SSE of Coalfield, Tennessee
  10. 1.7 1 km N of Huntsville, Tennessee
  11. 1.7 11 km NNE of Decatur, Tennessee
  12. 2.2 2 km SSE of Englewood, Tennessee
  13. 2.1 2 km SSE of Englewood, Tennessee
  14. 2.1 12 km NNE of Decatur, TN
  15. 2.1 11 km NNE of Decatur, 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.