QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

4 km SSW of Imboden, Arkansas

· 16 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lawrence County 17 kmSharp County 24 kmRandolph County 25 kmGreene County 57 kmIndependence County 58 kmOregon County 60 kmFulton County 60 kmRipley County 61 kmCraighead County 64 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 3.1 (md)
Depth
16 km below the surface
Felt
221 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Lawrence County, 17 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1426 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 221 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 220,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,900× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× more

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 36.1687, -91.1988. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lawrence County, AR 17 km (10 mi) NNW of here earthquakes near Lawrence County
Sharp County, AR 24 km (15 mi) E of here earthquakes near Sharp County
Randolph County, AR 25 km (15 mi) SW of here earthquakes near Randolph County
Greene County, AR 57 km (35 mi) W of here earthquakes near Greene County
Independence County, AR 58 km (36 mi) NE of here earthquakes near Independence County
Oregon County, MO 60 km (37 mi) SSE of here earthquakes near Oregon County

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

Aftershocks so far

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

  1. 1.7 4 km ESE of Lynn, Arkansas
  2. 2.1 5 km S of Strawberry, Arkansas
  3. 1.8 3 km SE of Strawberry, Arkansas
  4. 2.2 0 km SSE of Strawberry, Arkansas
  5. 2.2 13 km W of Maynard, Arkansas
  6. 1.8 5 km SSW of Strawberry, Arkansas
  7. 2.1 5 km SSW of Strawberry, Arkansas
  8. 1.8 9 km SSW of Williford, Arkansas
  9. 2.2 8 km SW of Williford, Arkansas
  10. 1.8 8 km SW of Williford, Arkansas
  11. 1.9 12 km SSW of Strawberry, Arkansas
  12. 1.8 3 km WNW of Lynn, Arkansas
  13. 2.1 6 km SSW of Strawberry, Arkansas
  14. 2.1 5 km N of Strawberry, Arkansas
  15. 2.1 5 km NW of Sidney, 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.