QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

5 km SE of Ash Flat, Arkansas

· 20 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sharp County 9 kmFulton County 31 kmIzard County 32 kmLawrence County 45 kmIndependence County 49 kmRandolph County 52 kmOregon County 58 kmStone County 63 kmBaxter County 69 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
20 km below the surface
Felt
no reports yet
Nearest
Sharp County, 9 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1929 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 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 36.1823, -91.5707. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sharp County, AR 9 km (6 mi) W of here earthquakes near Sharp County
Fulton County, AR 31 km (20 mi) SE of here earthquakes near Fulton County
Izard County, AR 32 km (20 mi) ENE of here earthquakes near Izard County
Lawrence County, AR 45 km (28 mi) WNW of here earthquakes near Lawrence County
Independence County, AR 49 km (31 mi) N of here earthquakes near Independence County
Randolph County, AR 52 km (32 mi) WSW of here earthquakes near Randolph County

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

Aftershocks so far

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

  1. 1.5 5 km SE of Strawberry, Arkansas
  2. 1.7 4 km SE of Strawberry, Arkansas
  3. 2.5 2 km ESE of Strawberry, Arkansas
  4. 1.6 3 km SSE of Lynn, Arkansas
  5. 2.4 7 km SW of Ravenden, Arkansas
  6. 2.3 7 km SSW of Ravenden, Arkansas
  7. 2.0 4 km SW of Powhatan, Arkansas
  8. 2.1 5 km N of Black Rock, Arkansas
  9. 1.6 8 km NW of Strawberry, Arkansas
  10. 1.8 3 km N of Black Rock, Arkansas
  11. 1.6 8 km WNW of Strawberry, Arkansas
  12. 1.6 4 km SE of Strawberry, Arkansas
  13. 2.3 5 km NNW of Strawberry, Arkansas
  14. 2.1 9 km NNW of Ravenden Springs, Arkansas
  15. 1.8 2 km W of Imboden, 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.