QuakeIndex

mine collapse · reviewed by a seismologist

M 4.3mw

2 km ENE of Crab Orchard, Tennessee

· 0.2 km deep · released about 43 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cumberland County 13 kmRoane County 31 kmMorgan County 31 kmRhea County 36 kmMeigs County 45 kmBledsoe County 48 kmFentress County 51 kmLoudon County 53 kmWhite County 54 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 4.3 (mw)
Depth
0.2 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Cumberland County, 13 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1794 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 1 person has reported feeling it to USGS.

USGS catalogues this as mine collapse, not an earthquake.

How big was it?

This earthquake released about 43 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 4,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 180× the energy of this one
  3. Magna, Utah 2020 M 5.7 130× the energy of this one
  4. This earthquake M 4.3 about 43 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 89× more

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 35.9163, -84.8532. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cumberland County, TN 13 km (8 mi) ESE of here earthquakes near Cumberland County
Roane County, TN 31 km (19 mi) WNW of here earthquakes near Roane County
Morgan County, TN 31 km (19 mi) SW of here earthquakes near Morgan County
Rhea County, TN 36 km (22 mi) NNE of here earthquakes near Rhea County
Meigs County, TN 45 km (28 mi) N of here earthquakes near Meigs County
Bledsoe County, TN 48 km (30 mi) NE of here earthquakes near Bledsoe County

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

Aftershocks so far

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

  1. 2.2 10 km WNW of Philadelphia, Tennessee
  2. 2.2 10 km WNW of Philadelphia, Tennessee
  3. 2.2 2 km W of Dayton, Tennessee
  4. 2.1 4 km NNW of Dayton, Tennessee
  5. 2.2 13 km S of Midtown, Tennessee
  6. 1.6 9 km SW of Spring City, Tennessee
  7. 1.8 5 km NNE of Niota, Tennessee
  8. 1.8 4 km WSW of Decatur, Tennessee
  9. 2.0 10 km NNW of Dayton, Tennessee
  10. 1.9 10 km S of Spring City, Tennessee
  11. 2.5 9 km WSW of Oakdale, Tennessee
  12. 2.0 1 km ENE of Dayton, Tennessee
  13. 1.8 4 km SW of Sweetwater, Tennessee
  14. 1.5 6 km NNW of Philadelphia, Tennessee
  15. 1.9 15 km WNW of Sweetwater, 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 1.4 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.