QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km NNW of Greenbrier, Arkansas

· 8.6 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Faulkner County 13 kmConway County 27 kmVan Buren County 38 kmCleburne County 51 kmPulaski County 55 kmWhite County 58 kmPerry County 59 kmPope County 61 kmStone County 71 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
8.6 km below the surface
Felt
no reports yet
Nearest
Faulkner County, 13 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2067 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 38 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 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 35.2560, -92.3948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Faulkner County, AR 13 km (8 mi) NNW of here earthquakes near Faulkner County
Conway County, AR 27 km (17 mi) E of here earthquakes near Conway County
Van Buren County, AR 38 km (24 mi) SSE of here earthquakes near Van Buren County
Cleburne County, AR 51 km (32 mi) SW of here earthquakes near Cleburne County
Pulaski County, AR 55 km (34 mi) N of here earthquakes near Pulaski County
White County, AR 58 km (36 mi) W of here earthquakes near White County

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

Aftershocks so far

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

  1. 2.3 3 km NW of Mount Vernon, Arkansas
  2. 1.7 8 km SW of Heber Springs, Arkansas
  3. 2.3 3 km NE of Greenbrier, Arkansas
  4. 2.0 3 km SSE of Guy, Arkansas
  5. 2.4 11 km W of Clinton, Arkansas
  6. 1.8 2 km WNW of Enola, Arkansas
  7. 2.2 10 km WSW of Center Ridge, Arkansas
  8. 1.9 5 km W of Damascus, Arkansas
  9. 2.1 5 km NNE of Greenbrier, Arkansas
  10. 2.0 Arkansas
  11. 2.3 6 km ESE of Center Ridge, Arkansas
  12. 1.7 1 km ENE of Enola, Arkansas
  13. 1.6 3 km WNW of Greenbrier, Arkansas
  14. 1.8 9 km WSW of Center Ridge, Arkansas
  15. 2.4 10 km NE of Damascus, 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.