QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

4 km SE of Imboden, Arkansas

· 12 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lawrence County 15 kmRandolph County 22 kmSharp County 29 kmGreene County 52 kmRipley County 58 kmCraighead County 60 kmIndependence County 61 kmOregon County 62 kmJackson 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 2.3 (md)
Depth
12 km below the surface
Felt
37 reports · strongest reported intensity IV
Nearest
Lawrence County, 15 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2219 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 37 people have reported feeling it to USGS.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 36.1720, -91.1457. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lawrence County, AR 15 km (9 mi) NNW of here earthquakes near Lawrence County
Randolph County, AR 22 km (13 mi) SSW of here earthquakes near Randolph County
Sharp County, AR 29 km (18 mi) E of here earthquakes near Sharp County
Greene County, AR 52 km (33 mi) W of here earthquakes near Greene County
Ripley County, MO 58 km (36 mi) SSW of here earthquakes near Ripley County
Craighead County, AR 60 km (37 mi) NW of here earthquakes near Craighead 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. 2.2 4 km WNW of Powhatan, Arkansas
  2. 2.1 5 km WNW of Powhatan, Arkansas
  3. 2.1 6 km WNW of Powhatan, Arkansas
  4. 1.6 4 km NE of Black Rock, Arkansas
  5. 1.8 5 km WNW of Powhatan, Arkansas
  6. 1.5 5 km WNW of Powhatan, Arkansas
  7. 2.2 6 km WNW of Powhatan, Arkansas
  8. 2.1 11 km SE of Ash Flat, Arkansas
  9. 2.2 4 km SE of Ash Flat, Arkansas
  10. 1.7 2 km W of Powhatan, Arkansas
  11. 2.2 6 km WNW of Powhatan, Arkansas
  12. 1.8 6 km N of Black Rock, Arkansas
  13. 2.2 10 km W of Maynard, Arkansas
  14. 2.0 6 km NE of Ravenden Springs, Arkansas
  15. 2.0 6 km NNW of Black Rock, 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.