QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6mw

3 km WNW of Marked Tree, Arkansas

· 8.2 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Poinsett County 21 kmCraighead County 36 kmCross County 40 kmCrittenden County 40 kmMississippi County 44 kmSt. Francis County 63 kmTipton County 64 kmShelby County 64 kmGreene County 65 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 3.6 (mw)
Depth
8.2 km below the surface
Felt
310 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
Nearest
Poinsett County, 21 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2150 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 310 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.9× 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 35.5387, -90.4557. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Poinsett County, AR 21 km (13 mi) E of here earthquakes near Poinsett County
Craighead County, AR 36 km (22 mi) SSE of here earthquakes near Craighead County
Cross County, AR 40 km (25 mi) NE of here earthquakes near Cross County
Crittenden County, AR 40 km (25 mi) NNW of here earthquakes near Crittenden County
Mississippi County, AR 44 km (28 mi) SW of here earthquakes near Mississippi County
St. Francis County, AR 63 km (39 mi) NNE of here earthquakes near St. Francis County

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

Aftershocks so far

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

  1. 2.8 5 km W of Dell, Arkansas
  2. 1.6 5 km NE of Etowah, Arkansas
  3. 1.6 3 km SSE of Caraway, Arkansas
  4. 1.7 6 km NE of Etowah, Arkansas
  5. 1.6 6 km NE of Etowah, Arkansas
  6. 3.8 6 km NE of Etowah, Arkansas
  7. 1.9 1 km S of Cherry Valley, Arkansas
  8. 1.5 5 km NNW of Victoria, Arkansas
  9. 1.7 6 km NW of Lepanto, Arkansas
  10. 1.8 7 km SSE of Manila, Arkansas
  11. 1.6 5 km NNE of Etowah, Arkansas
  12. 1.8 1 km WNW of Etowah, Arkansas
  13. 1.9 7 km ENE of Etowah, Arkansas
  14. 1.6 4 km SSE of Caraway, Arkansas
  15. 2.0 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.