QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

6 km ENE of Smithville, Arkansas

· 12 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lawrence County 15 kmSharp County 22 kmRandolph County 32 kmIndependence County 50 kmJackson County 57 kmFulton County 60 kmIzard County 60 kmGreene County 61 kmCraighead County 63 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
12 km below the surface
Felt
no reports yet
Nearest
Lawrence County, 15 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 316 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 36.1073, -91.2418. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lawrence County, AR 15 km (9 mi) WNW of here earthquakes near Lawrence County
Sharp County, AR 22 km (14 mi) ESE of here earthquakes near Sharp County
Randolph County, AR 32 km (20 mi) SW of here earthquakes near Randolph County
Independence County, AR 50 km (31 mi) NE of here earthquakes near Independence County
Jackson County, AR 57 km (35 mi) N of here earthquakes near Jackson County
Fulton County, AR 60 km (37 mi) ESE of here earthquakes near Fulton 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. 1.9 2 km N of Strawberry, Arkansas
  2. 2.2 3 km N of Strawberry, Arkansas
  3. 1.6 3 km NE of Strawberry, Arkansas
  4. 1.8 4 km NNW of Strawberry, Arkansas
  5. 1.6 3 km N of Strawberry, Arkansas
  6. 1.9 3 km N of Strawberry, Arkansas
  7. 2.1 5 km SSW of Strawberry, Arkansas
  8. 1.8 9 km W of Maynard, Arkansas
  9. 2.2 2 km W of Lynn, Arkansas
  10. 1.8 2 km SW of Lynn, Arkansas
  11. 1.8 2 km W of Lynn, Arkansas
  12. 1.7 3 km WNW of Lynn, Arkansas
  13. 2.2 4 km SSE of Maynard, Arkansas
  14. 2.1 3 km WNW of Lynn, Arkansas
  15. 2.0 4 km NW of Lynn, 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.