QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

4 km E of Niota, Tennessee

· 9.5 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McMinn County 14 kmMonroe County 24 kmMeigs County 29 kmLoudon County 30 kmRoane County 38 kmRhea County 42 kmPolk County 45 kmBradley County 51 kmBlount 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
9.5 km below the surface
Felt
no reports yet
Nearest
McMinn County, 14 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1951 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 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 35.5097, -84.5010. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McMinn County, TN 14 km (9 mi) NE of here earthquakes near McMinn County
Monroe County, TN 24 km (15 mi) WNW of here earthquakes near Monroe County
Meigs County, TN 29 km (18 mi) E of here earthquakes near Meigs County
Loudon County, TN 30 km (19 mi) SW of here earthquakes near Loudon County
Roane County, TN 38 km (23 mi) S of here earthquakes near Roane County
Rhea County, TN 42 km (26 mi) ESE of here earthquakes near Rhea County

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

Aftershocks so far

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

  1. 1.7 3 km NE of Greenback, Tennessee
  2. 1.8 Tennessee
  3. 1.8 4 km NE of Vonore, Tennessee
  4. 2.2 4 km ENE of Madisonville, Tennessee
  5. 2.0 1 km ENE of Dayton, Tennessee
  6. 1.8 4 km SW of Sweetwater, Tennessee
  7. 2.0 Tennessee
  8. 1.9 8 km SSE of Vonore, Tennessee
  9. 2.5 7 km WSW of Tellico Plains, Tennessee
  10. 1.5 6 km NNW of Philadelphia, Tennessee
  11. 1.9 6 km E of Vonore, Tennessee
  12. 1.9 15 km WNW of Sweetwater, Tennessee
  13. 1.5 5 km E of Niota, Tennessee
  14. 1.9 7 km E of Benton, Tennessee
  15. 2.0 11 km NNE 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 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.