QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

7 km SSE of Sewanee, Tennessee

· 6.5 km deep · released about 450 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Franklin County 20 kmMarion County 25 kmGrundy County 32 kmCoffee County 42 kmJackson County 43 kmMoore County 46 kmDade County 47 kmSequatchie County 50 kmWarren County 60 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 2.8 (md)
Depth
6.5 km below the surface
Felt
16 reports · strongest reported intensity V
Nearest
Franklin County, 20 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2251 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 16 people have reported feeling it to USGS.

How big was it?

This earthquake released about 450 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 34,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 24,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 450 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 35.1420, -85.8830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Franklin County, TN 20 km (12 mi) E of here earthquakes near Franklin County
Marion County, TN 25 km (16 mi) W of here earthquakes near Marion County
Grundy County, TN 32 km (20 mi) SSW of here earthquakes near Grundy County
Coffee County, TN 42 km (26 mi) SSE of here earthquakes near Coffee County
Jackson County, AL 43 km (27 mi) NNE of here earthquakes near Jackson County
Moore County, TN 46 km (29 mi) ESE of here earthquakes near Moore County

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

Aftershocks so far

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

  1. 2.4 12 km S of Tracy City, Tennessee
  2. 2.0 4 km NNE of Trenton, Georgia
  3. 2.3 3 km S of Lone Oak, Tennessee
  4. 2.1 6 km SW of Bridgeport, Alabama
  5. 2.3 4 km NE of Stevenson, Alabama
  6. 2.5 7 km ENE of Stevenson, Alabama
  7. 2.5 6 km SSE of Sewanee, Tennessee
  8. 2.2 9 km SE of Palmer, Tennessee
  9. 1.9 5 km SSE of Stevenson, Alabama
  10. 2.3 4 km ESE of Powells Crossroads, Tennessee
  11. 2.3 3 km WSW of Trenton, Georgia
  12. 2.4 10 km NNW of Kimball, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.