QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

7 km SE of Dayton, Tennessee

· 24 km deep · released about 67 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Meigs County 16 kmRhea County 18 kmBledsoe County 28 kmMcMinn County 31 kmBradley County 33 kmHamilton County 38 kmSequatchie County 41 kmPolk County 53 kmVan Buren County 53 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 2.2 (md)
Depth
24 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Meigs County, 16 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2037 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 67 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 160,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 67 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 35.4392, -84.9620. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Meigs County, TN 16 km (10 mi) WSW of here earthquakes near Meigs County
Rhea County, TN 18 km (11 mi) S of here earthquakes near Rhea County
Bledsoe County, TN 28 km (17 mi) SE of here earthquakes near Bledsoe County
McMinn County, TN 31 km (19 mi) W of here earthquakes near McMinn County
Bradley County, TN 33 km (21 mi) NNW of here earthquakes near Bradley County
Hamilton County, TN 38 km (23 mi) NE of here earthquakes near Hamilton County

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

Aftershocks so far

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

  1. 2.6 14 km W of Graysville, Tennessee
  2. 2.3 13 km W of Graysville, Tennessee
  3. 2.1 13 km W of Graysville, Tennessee
  4. 2.0 0 km S of Niota, Tennessee
  5. 2.6 9 km NNW of Graysville, Tennessee
  6. 1.7 5 km E of Niota, Tennessee
  7. 2.2 3 km ENE of East Brainerd, Tennessee
  8. 2.4 7 km E of Etowah, Tennessee
  9. 2.2 7 km ENE of Niota, Tennessee
  10. 2.0 10 km NNW of Dayton, Tennessee
  11. 2.4 9 km WNW of Hopewell, Tennessee
  12. 1.9 10 km S of Spring City, Tennessee
  13. 1.7 4 km W of Etowah, Tennessee
  14. 2.4 1 km SE of Etowah, Tennessee
  15. 1.7 8 km ENE of Wildwood Lake, 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 1,800 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.