QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km N of Hazel Green, Alabama

· 5.0 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madison County 21 kmLincoln County 21 kmLimestone County 40 kmMoore County 42 kmFranklin County 49 kmGiles County 50 kmJackson County 58 kmMarshall County 60 kmMorgan County 61 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 2.1 (md)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Madison County, 21 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2953 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 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 34.9525, -86.5757. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madison County, AL 21 km (13 mi) N of here earthquakes near Madison County
Lincoln County, TN 21 km (13 mi) S of here earthquakes near Lincoln County
Limestone County, AL 40 km (25 mi) ENE of here earthquakes near Limestone County
Moore County, TN 42 km (26 mi) SSW of here earthquakes near Moore County
Franklin County, TN 49 km (30 mi) WSW of here earthquakes near Franklin County
Giles County, TN 50 km (31 mi) ESE of here earthquakes near Giles County

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

Aftershocks so far

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

  1. 2.4 3 km SSW of Park City, Tennessee
  2. 2.4 5 km SSW of Gurley, Alabama
  3. 2.7 6 km NW of Hazel Green, Alabama
  4. 2.6 13 km SE of Triana, Alabama
  5. 2.4 11 km W of Elkton, Tennessee
  6. 2.3 10 km ESE of Moores Mill, 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.