QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

4 km N of Ooltewah, Tennessee

· 20 km deep · released about 72 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hamilton County 14 kmBradley County 18 kmCatoosa County 25 kmWhitfield County 36 kmSequatchie County 43 kmMurray County 46 kmPolk County 47 kmWalker County 48 kmMeigs County 49 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 2.3 (md)
Depth
20 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Hamilton County, 14 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2097 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 72 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 210,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 72 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 35.1182, -85.0557. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hamilton County, TN 14 km (9 mi) ESE of here earthquakes near Hamilton County
Bradley County, TN 18 km (11 mi) WSW of here earthquakes near Bradley County
Catoosa County, GA 25 km (16 mi) NNE of here earthquakes near Catoosa County
Whitfield County, GA 36 km (22 mi) NNW of here earthquakes near Whitfield County
Sequatchie County, TN 43 km (27 mi) SE of here earthquakes near Sequatchie County
Murray County, GA 46 km (29 mi) NW of here earthquakes near Murray County

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

Aftershocks so far

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

  1. 2.2 4 km WSW of Tunnel Hill, Georgia
  2. 2.2 10 km W of Graysville, Tennessee
  3. 1.8 4 km WSW of Decatur, Tennessee
  4. 2.1 11 km SW of Dalton, Georgia
  5. 2.0 15 km ESE of Wildwood Lake, Tennessee
  6. 1.9 1 km E of Collegedale, Tennessee
  7. 2.2 8 km SSW of Dalton, Georgia
  8. 2.6 14 km W of Graysville, Tennessee
  9. 2.3 13 km W of Graysville, Tennessee
  10. 2.1 13 km W of Graysville, Tennessee
  11. 2.6 9 km NNW of Graysville, Tennessee
  12. 2.2 3 km ENE of East Brainerd, Tennessee
  13. 1.9 Alabama
  14. 2.4 9 km WNW of Hopewell, Tennessee
  15. 1.9 6 km NW of Eton, Georgia

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.