QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

8 km NW of Smithville, Arkansas

· 5.1 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sharp County 11 kmLawrence County 26 kmRandolph County 37 kmIndependence County 48 kmFulton County 49 kmIzard County 50 kmOregon County 61 kmJackson County 61 kmGreene 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 1.9 (md)
Depth
5.1 km below the surface
Felt
no reports yet
Nearest
Sharp County, 11 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2175 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 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 36.1373, -91.3603. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sharp County, AR 11 km (7 mi) ESE of here earthquakes near Sharp County
Lawrence County, AR 26 km (16 mi) WNW of here earthquakes near Lawrence County
Randolph County, AR 37 km (23 mi) SW of here earthquakes near Randolph County
Independence County, AR 48 km (30 mi) NNE of here earthquakes near Independence County
Fulton County, AR 49 km (31 mi) ESE of here earthquakes near Fulton County
Izard County, AR 50 km (31 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

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

  1. 2.0 3 km SSW of Imboden, Arkansas
  2. 3.1 4 km SSW of Imboden, Arkansas
  3. 2.1 18 km WNW of Maynard, Arkansas
  4. 1.9 2 km W of Lynn, Arkansas
  5. 2.3 6 km WSW of Ravenden, Arkansas
  6. 1.7 Missouri-Arkansas border region
  7. 1.7 2 km WSW of Imboden, Arkansas
  8. 2.1 2 km SE of Ravenden, Arkansas
  9. 1.9 3 km ESE of Ravenden, Arkansas
  10. 1.8 Missouri-Arkansas border region
  11. 1.9 8 km SSE of Williford, Arkansas
  12. 2.1 7 km SW of Ravenden, Arkansas
  13. 1.7 6 km SW of Ravenden, Arkansas
  14. 1.9 6 km SSE of Williford, Arkansas
  15. 2.3 8 km SSE of Williford, 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.