QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

4 km N of Sweetwater, Tennessee

· 25 km deep · released about 82 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loudon County 17 kmRoane County 23 kmMcMinn County 28 kmMonroe County 29 kmMeigs County 35 kmRhea County 44 kmBlount County 49 kmMorgan County 57 kmAnderson County 58 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
25 km below the surface
Felt
no reports yet
Nearest
Loudon County, 17 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2357 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 82 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 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 82 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 35.6440, -84.4608. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loudon County, TN 17 km (10 mi) SW of here earthquakes near Loudon County
Roane County, TN 23 km (14 mi) SSE of here earthquakes near Roane County
McMinn County, TN 28 km (18 mi) NNE of here earthquakes near McMinn County
Monroe County, TN 29 km (18 mi) NW of here earthquakes near Monroe County
Meigs County, TN 35 km (22 mi) ENE of here earthquakes near Meigs County
Rhea County, TN 44 km (28 mi) E of here earthquakes near Rhea 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. 2.0 3 km SSW of Tellico Village, Tennessee
  2. 2.1 11 km S of Oak Ridge, Tennessee
  3. 4.3 2 km ENE of Crab Orchard, Tennessee
  4. 3.1 4 km SSW of Crab Orchard, Tennessee
  5. 1.9 7 km WSW of Maryville, Tennessee
  6. 2.1 6 km NNW of Calhoun, Tennessee
  7. 2.0 6 km S of Friendsville, Tennessee
  8. 2.0 2 km WSW of Alcoa, Tennessee
  9. 2.3 3 km SW of Alcoa, Tennessee
  10. 2.1 6 km E of Kingston, Tennessee
  11. 1.7 5 km S of Tellico Plains, Tennessee
  12. 2.1 9 km ENE of Dayton, Tennessee
  13. 1.6 5 km E of Sweetwater, Tennessee
  14. 1.8 4 km E of Niota, Tennessee
  15. 1.5 11 km E of Kingston, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2018-12-12 — it released about 1,500 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.