QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km ESE of El Dorado, Arkansas

· 7.0 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Union County 1 kmCalhoun County 43 kmUnion Parish 44 kmBradley County 51 kmOuachita County 53 kmClaiborne Parish 54 kmColumbia County 59 kmLincoln Parish 64 kmAshley County 77 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
7.0 km below the surface
Felt
no reports yet
Nearest
Union County, 1 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2718 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 33.1787, -92.5957. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Union County, AR 1 km (1 mi) NNE of here earthquakes near Union County
Calhoun County, AR 43 km (27 mi) S of here earthquakes near Calhoun County
Union Parish, LA 44 km (27 mi) NNW of here earthquakes near Union Parish
Bradley County, AR 51 km (32 mi) SW of here earthquakes near Bradley County
Ouachita County, AR 53 km (33 mi) SSE of here earthquakes near Ouachita County
Claiborne Parish, LA 54 km (33 mi) NE of here earthquakes near Claiborne Parish

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

Aftershocks so far

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

  1. 2.8 13 km SSE of El Dorado, Arkansas
  2. 2.8 12 km ENE of Junction City, Arkansas

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.