QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

11 km SSW of Tuscaloosa, Alabama

· 4.2 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tuscaloosa County 22 kmHale County 40 kmGreene County 44 kmBibb County 47 kmPickens County 49 kmPerry County 61 kmFayette County 68 kmSumter County 79 kmWalker County 81 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
4.2 km below the surface
Felt
5 reports · strongest reported intensity II
Nearest
Tuscaloosa County, 22 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 35 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 46 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 5.8 330,000× 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 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 33.1138, -87.6230. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tuscaloosa County, AL 22 km (13 mi) SSW of here earthquakes near Tuscaloosa County
Hale County, AL 40 km (25 mi) N of here earthquakes near Hale County
Greene County, AL 44 km (27 mi) NE of here earthquakes near Greene County
Bibb County, AL 47 km (29 mi) WNW of here earthquakes near Bibb County
Pickens County, AL 49 km (30 mi) ESE of here earthquakes near Pickens County
Perry County, AL 61 km (38 mi) NNW of here earthquakes near Perry County

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 2.4 13 km W of Union, 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.