QuakeIndex

mine collapse · reviewed by a seismologist

M 3.1md

4 km SSW of Crab Orchard, Tennessee

· 0.0 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cumberland County 12 kmRhea County 31 kmRoane County 34 kmMorgan County 37 kmMeigs County 41 kmBledsoe County 42 kmWhite County 51 kmVan Buren County 54 kmFentress County 55 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 3.1 (md)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Cumberland County, 12 km NW
Status
Reviewed by a seismologist

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

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

USGS catalogues this as mine collapse, not an earthquake.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 260,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,200× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 35.8767, -84.8982. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cumberland County, TN 12 km (8 mi) SE of here earthquakes near Cumberland County
Rhea County, TN 31 km (19 mi) N of here earthquakes near Rhea County
Roane County, TN 34 km (21 mi) W of here earthquakes near Roane County
Morgan County, TN 37 km (23 mi) SW of here earthquakes near Morgan County
Meigs County, TN 41 km (26 mi) N of here earthquakes near Meigs County
Bledsoe County, TN 42 km (26 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

25 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. 1.8 6 km SW of Decatur, Tennessee
  7. 1.6 9 km SW of Spring City, Tennessee
  8. 2.3 1 km NW of Niota, Tennessee
  9. 1.8 5 km NNE of Niota, Tennessee
  10. 2.2 9 km NNW of Graysville, Tennessee
  11. 1.8 4 km WSW of Decatur, Tennessee
  12. 2.6 9 km NNW of Graysville, Tennessee
  13. 2.0 10 km NNW of Dayton, Tennessee
  14. 1.9 10 km S of Spring City, Tennessee
  15. 1.9 3 km N of Niota, 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 92 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.