QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

11 km NNW of Pleasant Groves, Alabama

· 4.5 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jackson County 25 kmMadison County 29 kmFranklin County 38 kmLincoln County 47 kmMoore County 52 kmDeKalb County 58 kmMarshall County 59 kmMarion County 66 kmDade County 67 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 1.8 (md)
Depth
4.5 km below the surface
Felt
no reports yet
Nearest
Jackson County, 25 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3128 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 34.8345, -86.2408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jackson County, AL 25 km (16 mi) WNW of here earthquakes near Jackson County
Madison County, AL 29 km (18 mi) ENE of here earthquakes near Madison County
Franklin County, TN 38 km (24 mi) SSW of here earthquakes near Franklin County
Lincoln County, TN 47 km (29 mi) SE of here earthquakes near Lincoln County
Moore County, TN 52 km (32 mi) SSE of here earthquakes near Moore County
DeKalb County, AL 58 km (36 mi) NW of here earthquakes near DeKalb County

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

Aftershocks so far

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

  1. 2.4 3 km SSW of Park City, Tennessee
  2. 2.3 0 km NNE of Section, Alabama
  3. 2.1 6 km SW of Bridgeport, Alabama
  4. 2.3 4 km NE of Stevenson, Alabama
  5. 2.5 7 km ENE of Stevenson, Alabama
  6. 2.5 6 km SSE of Sewanee, Tennessee
  7. 2.4 5 km SSW of Gurley, Alabama
  8. 2.7 6 km NW of Hazel Green, Alabama
  9. 1.9 5 km SSE of Stevenson, Alabama
  10. 2.2 4 km SSE of Dutton, Alabama
  11. 2.6 13 km SE of Triana, Alabama
  12. 2.8 7 km SSE of Sewanee, Tennessee
  13. 3.1 7 km SSE of Sewanee, Tennessee
  14. 2.3 10 km ESE of Moores Mill, Alabama
  15. 2.4 8 km E of Skyline, Alabama

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.