QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

Tennessee

· 21 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loudon County 17 kmMonroe County 19 kmBlount County 27 kmRoane County 39 kmMcMinn County 43 kmGraham County 44 kmKnox County 49 kmCherokee County 54 kmAnderson County 56 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 1.8 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Loudon County, 17 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1308 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 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 35.6105, -84.2022. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loudon County, TN 17 km (11 mi) SE of here earthquakes near Loudon County
Monroe County, TN 19 km (12 mi) NNE of here earthquakes near Monroe County
Blount County, TN 27 km (17 mi) WSW of here earthquakes near Blount County
Roane County, TN 39 km (24 mi) SE of here earthquakes near Roane County
McMinn County, TN 43 km (27 mi) ENE of here earthquakes near McMinn County
Graham County, NC 44 km (28 mi) NW of here earthquakes near Graham 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. 1.6 16 km SE of Vonore, Tennessee
  2. 1.8 4 km SSW of Tellico Village, Tennessee
  3. 1.9 1 km WNW of Tellico Village, Tennessee
  4. 2.3 1 km NW of Niota, Tennessee
  5. 1.7 7 km SW of Maryville, Tennessee
  6. 2.1 7 km SW of Maryville, Tennessee
  7. 2.3 7 km SW of Maryville, Tennessee
  8. 2.0 0 km WSW of Alcoa, Tennessee
  9. 1.8 5 km NNE of Niota, Tennessee
  10. 2.0 5 km S of Englewood, Tennessee
  11. 1.7 2 km SSE of Philadelphia, Tennessee
  12. 1.9 3 km N of Madisonville, Tennessee
  13. 1.8 11 km SW of Tellico Plains, Tennessee
  14. 1.6 7 km W of Tellico Plains, Tennessee
  15. 1.9 11 km SE of Tellico Plains, 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 6,900 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.