QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

2 km N of Graysville, Tennessee

· 19 km deep · released about 24 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bledsoe County 18 kmRhea County 19 kmMeigs County 24 kmSequatchie County 32 kmHamilton County 36 kmBradley County 41 kmMcMinn County 42 kmVan Buren County 42 kmCumberland County 54 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
19 km below the surface
Felt
no reports yet
Nearest
Bledsoe County, 18 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2871 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 24 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 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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 35.4725, -85.0817. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bledsoe County, TN 18 km (11 mi) SE of here earthquakes near Bledsoe County
Rhea County, TN 19 km (12 mi) SW of here earthquakes near Rhea County
Meigs County, TN 24 km (15 mi) W of here earthquakes near Meigs County
Sequatchie County, TN 32 km (20 mi) ENE of here earthquakes near Sequatchie County
Hamilton County, TN 36 km (22 mi) NNE of here earthquakes near Hamilton County
Bradley County, TN 41 km (25 mi) NNW of here earthquakes near Bradley County

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

Aftershocks so far

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

  1. 1.5 7 km ESE of Calhoun, Tennessee
  2. 2.3 4 km ESE of East Cleveland, Tennessee
  3. 1.6 9 km NNW of Decatur, Tennessee
  4. 2.4 6 km WNW of Niota, Tennessee
  5. 1.8 4 km W of Athens, Tennessee
  6. 2.0 5 km E of Riceville, Tennessee
  7. 2.1 10 km NNE of Decatur, Tennessee
  8. 2.3 4 km ESE of Powells Crossroads, Tennessee
  9. 3.1 4 km SSW of Crab Orchard, Tennessee
  10. 2.1 6 km NNW of Calhoun, Tennessee
  11. 1.8 5 km ENE of Lakesite, Tennessee
  12. 2.1 9 km ENE of Dayton, Tennessee
  13. 2.5 5 km NNE of East Brainerd, Tennessee
  14. 1.9 1 km NW of Niota, Tennessee
  15. 1.9 11 km SSW 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.