QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

11 km NE of Pangburn, Arkansas

· 0.1 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cleburne County 25 kmWhite County 27 kmIndependence County 32 kmJackson County 49 kmStone County 53 kmWoodruff County 58 kmFaulkner County 66 kmIzard County 67 kmVan Buren County 70 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
0.1 km below the surface
Felt
no reports yet
Nearest
Cleburne County, 25 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 862 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 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 35.5020, -91.7537. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cleburne County, AR 25 km (16 mi) ESE of here earthquakes near Cleburne County
White County, AR 27 km (17 mi) N of here earthquakes near White County
Independence County, AR 32 km (20 mi) SW of here earthquakes near Independence County
Jackson County, AR 49 km (31 mi) WSW of here earthquakes near Jackson County
Stone County, AR 53 km (33 mi) SE of here earthquakes near Stone County
Woodruff County, AR 58 km (36 mi) NW of here earthquakes near Woodruff County

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

Aftershocks so far

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

  1. 2.3 13 km SSW of Pleasant Plains, Arkansas
  2. 2.4 5 km WSW of Southside, Arkansas
  3. 1.8 3 km NNE of Tumbling Shoals, Arkansas
  4. 2.0 11 km S of Pleasant Plains, Arkansas
  5. 2.3 3 km NW of Mount Vernon, Arkansas
  6. 2.2 11 km SSW of Pleasant Plains, Arkansas
  7. 1.9 11 km SSW of Pleasant Plains, Arkansas
  8. 2.2 12 km SSW of Pleasant Plains, Arkansas
  9. 1.9 11 km SSW of Pleasant Plains, Arkansas
  10. 1.9 13 km SSW of Pleasant Plains, Arkansas
  11. 2.1 11 km SW of Pleasant Plains, Arkansas
  12. 1.7 11 km SSW of Pleasant Plains, Arkansas
  13. 2.1 12 km SSW of Pleasant Plains, Arkansas
  14. 2.3 12 km ENE of Pangburn, Arkansas
  15. 1.7 8 km SW of Heber Springs, 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.