QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

0 km E of Graysville, Tennessee

· 17 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bledsoe County 20 kmRhea County 21 kmMeigs County 25 kmSequatchie County 31 kmHamilton County 34 kmBradley County 38 kmMcMinn County 41 kmVan Buren County 45 kmCumberland County 57 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 1.7 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Bledsoe County, 20 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2894 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 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 35.4470, -85.0762. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bledsoe County, TN 20 km (12 mi) SE of here earthquakes near Bledsoe County
Rhea County, TN 21 km (13 mi) SW of here earthquakes near Rhea County
Meigs County, TN 25 km (15 mi) WSW of here earthquakes near Meigs County
Sequatchie County, TN 31 km (19 mi) ENE of here earthquakes near Sequatchie County
Hamilton County, TN 34 km (21 mi) NNE of here earthquakes near Hamilton County
Bradley County, TN 38 km (24 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

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

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