QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

10 km NNE of Decatur, Tennessee

· 5.8 km deep · released about 830 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Meigs County 12 kmRhea County 19 kmMcMinn County 22 kmRoane County 33 kmLoudon County 41 kmBledsoe County 42 kmCumberland County 45 kmMonroe County 47 kmBradley County 51 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 3.0 (md)
Depth
5.8 km below the surface
Felt
761 reports · strongest reported intensity V
Nearest
Meigs County, 12 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1441 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 761 people have reported feeling it to USGS.

How big was it?

This earthquake released about 830 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 410,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 830 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 35.6025, -84.7360. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Meigs County, TN 12 km (8 mi) NE of here earthquakes near Meigs County
Rhea County, TN 19 km (12 mi) E of here earthquakes near Rhea County
McMinn County, TN 22 km (14 mi) NNW of here earthquakes near McMinn County
Roane County, TN 33 km (21 mi) SW of here earthquakes near Roane County
Loudon County, TN 41 km (25 mi) WSW of here earthquakes near Loudon County
Bledsoe County, TN 42 km (26 mi) E of here earthquakes near Bledsoe County

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

Aftershocks so far

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

  1. 1.6 8 km N of Madisonville, Tennessee
  2. 2.3 8 km E of Pikeville, Tennessee
  3. 1.8 6 km SW of Tellico Plains, Tennessee
  4. 2.5 6 km ENE of Decatur, Tennessee
  5. 2.0 3 km WNW of Madisonville, Tennessee
  6. 2.1 6 km WNW of Vonore, Tennessee
  7. 2.0 4 km ESE of Huntsville, Tennessee
  8. 2.1 2 km WNW of Tellico Village, Tennessee
  9. 1.8 4 km WSW of Graysville, Tennessee
  10. 2.3 6 km SE of Englewood, Tennessee
  11. 1.7 10 km SSE of Vonore, Tennessee
  12. 1.6 8 km SSE of Vonore, Tennessee
  13. 1.7 6 km WSW of Tellico Village, Tennessee
  14. 1.7 11 km WNW of Loudon, Tennessee
  15. 2.1 2 km W of Hopewell, 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 140 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.