QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

3 km ENE of Madisonville, Tennessee

· 17 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Monroe County 11 kmLoudon County 23 kmMcMinn County 29 kmRoane County 40 kmBlount County 41 kmMeigs County 44 kmGraham County 49 kmCherokee County 50 kmPolk County 50 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
17 km below the surface
Felt
1 report · strongest reported intensity IV
Nearest
Monroe County, 11 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2656 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 35.5270, -84.3285. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Monroe County, TN 11 km (7 mi) NW of here earthquakes near Monroe County
Loudon County, TN 23 km (14 mi) S of here earthquakes near Loudon County
McMinn County, TN 29 km (18 mi) ENE of here earthquakes near McMinn County
Roane County, TN 40 km (25 mi) SSE of here earthquakes near Roane County
Blount County, TN 41 km (25 mi) WSW of here earthquakes near Blount County
Meigs County, TN 44 km (27 mi) E of here earthquakes near Meigs County

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

Aftershocks so far

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

  1. 2.0 8 km SE of Tellico Plains, Tennessee
  2. 2.4 7 km N of Benton, Tennessee
  3. 1.9 Tennessee
  4. 1.5 4 km WSW of Tellico Village, Tennessee
  5. 2.0 11 km SE of Vonore, Tennessee
  6. 1.9 1 km W of Etowah, Tennessee
  7. 1.9 3 km NNE of Madisonville, Tennessee
  8. 1.9 3 km ESE of Loudon, Tennessee
  9. 2.0 5 km NNE of Tellico Plains, Tennessee
  10. 1.6 11 km SW of Rockwood, Tennessee
  11. 2.3 12 km SW of Rockwood, Tennessee
  12. 2.2 15 km S of Tellico Plains, Tennessee
  13. 1.8 3 km SW of Sweetwater, Tennessee
  14. 2.4 4 km WSW of Tellico Village, TN
  15. 2.3 4 km N of Sweetwater, 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 8,200 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.