QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km WNW of Niota, Tennessee

· 16 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McMinn County 11 kmMeigs County 22 kmMonroe County 30 kmLoudon County 33 kmRhea County 35 kmRoane County 37 kmPolk County 46 kmBradley County 48 kmBledsoe 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 2.1 (md)
Depth
16 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
McMinn County, 11 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1253 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 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 35.5180, -84.5705. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McMinn County, TN 11 km (7 mi) NNE of here earthquakes near McMinn County
Meigs County, TN 22 km (14 mi) E of here earthquakes near Meigs County
Monroe County, TN 30 km (19 mi) WNW of here earthquakes near Monroe County
Loudon County, TN 33 km (21 mi) SW of here earthquakes near Loudon County
Rhea County, TN 35 km (22 mi) ESE of here earthquakes near Rhea County
Roane County, TN 37 km (23 mi) S of here earthquakes near Roane County

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

Aftershocks so far

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

  1. 1.7 4 km ENE of Niota, Tennessee
  2. 2.1 3 km ENE of Niota, Tennessee
  3. 1.6 9 km SW of Spring City, Tennessee
  4. 1.7 6 km SSE of Friendsville, Tennessee
  5. 1.6 16 km SE of Vonore, Tennessee
  6. 1.8 4 km SSW of Tellico Village, Tennessee
  7. 1.9 1 km WNW of Tellico Village, Tennessee
  8. 2.3 1 km NW of Niota, Tennessee
  9. 2.0 4 km SSW of Benton, Tennessee
  10. 1.8 5 km NNE of Niota, Tennessee
  11. 2.0 5 km S of Englewood, Tennessee
  12. 1.7 2 km SSE of Philadelphia, Tennessee
  13. 1.9 3 km N of Madisonville, Tennessee
  14. 1.8 11 km SW of Tellico Plains, Tennessee
  15. 1.6 7 km W 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 3,000 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.