QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

8 km N of Williford, Arkansas

· 11 km deep · released about 82 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sharp County 19 kmRandolph County 30 kmLawrence County 39 kmOregon County 40 kmFulton County 41 kmIzard County 55 kmRipley County 57 kmIndependence County 68 kmHowell County 68 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 2.3 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Sharp County, 19 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2302 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 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 82 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 36.3250, -91.3657. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sharp County, AR 19 km (12 mi) NNE of here earthquakes near Sharp County
Randolph County, AR 30 km (19 mi) W of here earthquakes near Randolph County
Lawrence County, AR 39 km (25 mi) NW of here earthquakes near Lawrence County
Oregon County, MO 40 km (25 mi) S of here earthquakes near Oregon County
Fulton County, AR 41 km (26 mi) E of here earthquakes near Fulton County
Izard County, AR 55 km (34 mi) ENE of here earthquakes near Izard County

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

Aftershocks so far

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

  1. 2.1 5 km WNW of Powhatan, Arkansas
  2. 2.1 6 km WNW of Powhatan, Arkansas
  3. 1.6 4 km NE of Black Rock, Arkansas
  4. 1.8 5 km WNW of Powhatan, Arkansas
  5. 1.5 5 km WNW of Powhatan, Arkansas
  6. 2.2 6 km WNW of Powhatan, Arkansas
  7. 2.1 11 km SE of Ash Flat, Arkansas
  8. 2.2 4 km SE of Ash Flat, Arkansas
  9. 1.7 2 km W of Powhatan, Arkansas
  10. 2.2 6 km WNW of Powhatan, Arkansas
  11. 1.8 6 km N of Black Rock, Arkansas
  12. 2.2 10 km W of Maynard, Arkansas
  13. 2.0 6 km NE of Ravenden Springs, Arkansas
  14. 2.0 6 km NNW of Black Rock, Arkansas
  15. 2.1 5 km SE of Ash Flat, 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.