QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

8 km SSE of Williford, Arkansas

· 12 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sharp County 13 kmLawrence County 25 kmRandolph County 32 kmFulton County 50 kmIndependence County 54 kmIzard County 54 kmOregon County 57 kmJackson County 65 kmRipley County 66 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 1.9 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Sharp County, 13 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1574 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 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 36.1788, -91.3232. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sharp County, AR 13 km (8 mi) E of here earthquakes near Sharp County
Lawrence County, AR 25 km (16 mi) NW of here earthquakes near Lawrence County
Randolph County, AR 32 km (20 mi) SW of here earthquakes near Randolph County
Fulton County, AR 50 km (31 mi) ESE of here earthquakes near Fulton County
Independence County, AR 54 km (33 mi) NNE of here earthquakes near Independence County
Izard County, AR 54 km (33 mi) E of here earthquakes near Izard County

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

Aftershocks so far

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

  1. 2.2 8 km SW of Williford, Arkansas
  2. 1.8 8 km SW of Williford, Arkansas
  3. 1.9 12 km SSW of Strawberry, Arkansas
  4. 1.8 3 km WNW of Lynn, Arkansas
  5. 2.1 6 km SSW of Strawberry, Arkansas
  6. 2.1 5 km N of Strawberry, Arkansas
  7. 2.1 5 km NW of Sidney, Arkansas
  8. 1.7 2 km WNW of Lynn, Arkansas
  9. 2.3 11 km NW of Strawberry, Arkansas
  10. 1.6 1 km W of Lynn, Arkansas
  11. 2.3 5 km SE of Imboden, Arkansas
  12. 2.0 6 km N of Black Rock, Arkansas
  13. 2.1 8 km NE of Smithville, Arkansas
  14. 2.0 4 km NNW of Minturn, Arkansas
  15. 1.9 12 km WNW of Smithville, 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.