QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

11 km E of Pangburn, Arkansas

· 0.1 km deep · released about 630 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N White County 21 kmCleburne County 31 kmIndependence County 36 kmJackson County 48 kmWoodruff County 51 kmStone County 60 kmFaulkner County 65 kmPrairie County 70 kmVan Buren County 74 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 2.9 (md)
Depth
0.1 km below the surface
Felt
47 reports · strongest reported intensity IV
Nearest
White County, 21 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 558 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 47 people have reported feeling it to USGS.

How big was it?

This earthquake released about 630 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 35.4435, -91.7143. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
White County, AR 21 km (13 mi) N of here earthquakes near White County
Cleburne County, AR 31 km (20 mi) ESE of here earthquakes near Cleburne County
Independence County, AR 36 km (22 mi) SSW of here earthquakes near Independence County
Jackson County, AR 48 km (30 mi) WSW of here earthquakes near Jackson County
Woodruff County, AR 51 km (32 mi) WNW of here earthquakes near Woodruff County
Stone County, AR 60 km (37 mi) SE of here earthquakes near Stone County

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

Aftershocks so far

18 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.