QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

2 km E of Greenback, Tennessee

· 27 km deep · released about 220 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loudon County 17 kmBlount County 21 kmMonroe County 26 kmRoane County 39 kmKnox County 41 kmGraham County 45 kmMcMinn County 50 kmAnderson County 51 kmSevier 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 2.6 (md)
Depth
27 km below the surface
Felt
6 reports · strongest reported intensity II
Nearest
Loudon County, 17 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 372 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 220 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 70,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 50,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.4× the energy of this one
  4. This earthquake M 2.6 about 220 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 35.6632, -84.1498. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loudon County, TN 17 km (10 mi) ESE of here earthquakes near Loudon County
Blount County, TN 21 km (13 mi) W of here earthquakes near Blount County
Monroe County, TN 26 km (16 mi) NNE of here earthquakes near Monroe County
Roane County, TN 39 km (25 mi) ESE of here earthquakes near Roane County
Knox County, TN 41 km (26 mi) SSW of here earthquakes near Knox County
Graham County, NC 45 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

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

  1. 2.0 3 km ESE of Tellico Village, Tennessee
  2. 1.8 0 km SE of Farragut, Tennessee
  3. 2.4 5 km E of Etowah, Tennessee
  4. 2.3 1 km S of Friendsville, Tennessee
  5. 1.8 5 km SSE of Friendsville, Tennessee
  6. 2.4 5 km SSE of Friendsville, Tennessee
  7. 1.7 4 km NE of Louisville, Tennessee
  8. 2.0 3 km WSW of Alcoa, Tennessee
  9. 2.2 3 km WSW of Alcoa, Tennessee
  10. 2.2 10 km WNW of Lake Santeetlah, North Carolina
  11. 1.8 11 km S of Tellico Plains, Tennessee
  12. 2.3 4 km SSW of Kingston, Tennessee
  13. 2.1 5 km S of Sweetwater, Tennessee
  14. 2.2 2 km SSW of Greenback, Tennessee
  15. 1.8 13 km SSE of Greenback, 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 4.1 on 2025-05-10 — it released about 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.