QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

6 km NW of Madisonville, Tennessee

· 8.6 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Monroe County 19 kmLoudon County 21 kmMcMinn County 24 kmRoane County 34 kmMeigs County 37 kmBlount County 46 kmRhea County 49 kmPolk County 52 kmCherokee 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 1.6 (md)
Depth
8.6 km below the surface
Felt
no reports yet
Nearest
Monroe County, 19 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 505 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 35.5608, -84.4087. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Monroe County, TN 19 km (12 mi) NW of here earthquakes near Monroe County
Loudon County, TN 21 km (13 mi) SSW of here earthquakes near Loudon County
McMinn County, TN 24 km (15 mi) NE of here earthquakes near McMinn County
Roane County, TN 34 km (21 mi) SSE of here earthquakes near Roane County
Meigs County, TN 37 km (23 mi) E of here earthquakes near Meigs County
Blount County, TN 46 km (29 mi) WSW of here earthquakes near Blount County

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

Aftershocks so far

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

  1. 1.8 5 km SSE of Friendsville, Tennessee
  2. 2.4 5 km SSE of Friendsville, Tennessee
  3. 1.7 4 km NE of Louisville, Tennessee
  4. 2.0 3 km WSW of Alcoa, Tennessee
  5. 2.2 3 km WSW of Alcoa, Tennessee
  6. 2.2 10 km WNW of Lake Santeetlah, North Carolina
  7. 1.8 11 km S of Tellico Plains, Tennessee
  8. 2.3 4 km SSW of Kingston, Tennessee
  9. 2.1 5 km S of Sweetwater, Tennessee
  10. 2.2 2 km SSW of Greenback, Tennessee
  11. 1.8 13 km SSE of Greenback, Tennessee
  12. 1.8 4 km E of Madisonville, Tennessee
  13. 2.5 5 km E of Madisonville, Tennessee
  14. 2.0 5 km NNW of Vonore, Tennessee
  15. 2.2 10 km WNW of Philadelphia, 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 19,000 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.