QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

5 km WNW of Powhatan, Arkansas

· 3.5 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lawrence County 9 kmSharp County 28 kmRandolph County 29 kmIndependence County 54 kmGreene County 54 kmJackson County 57 kmCraighead County 57 kmFulton County 66 kmRipley County 66 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 1.8 (md)
Depth
3.5 km below the surface
Felt
no reports yet
Nearest
Lawrence County, 9 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1744 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 36.1037, -91.1713. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lawrence County, AR 9 km (6 mi) NW of here earthquakes near Lawrence County
Sharp County, AR 28 km (17 mi) ESE of here earthquakes near Sharp County
Randolph County, AR 29 km (18 mi) SSW of here earthquakes near Randolph County
Independence County, AR 54 km (33 mi) NE of here earthquakes near Independence County
Greene County, AR 54 km (34 mi) W of here earthquakes near Greene County
Jackson County, AR 57 km (35 mi) N of here earthquakes near Jackson County

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

Aftershocks so far

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

  1. 2.0 9 km NE of Grubbs, Arkansas
  2. 2.3 5 km SE of Imboden, Arkansas
  3. 2.0 6 km N of Black Rock, Arkansas
  4. 2.1 8 km NE of Smithville, Arkansas
  5. 2.0 4 km NNW of Minturn, Arkansas
  6. 1.9 12 km WNW of Smithville, Arkansas
  7. 1.8 2 km SW of Ravenden, Arkansas
  8. 2.0 5 km N of Black Rock, Arkansas
  9. 2.2 5 km SSW of Strawberry, Arkansas
  10. 1.7 3 km N of Black Rock, Arkansas
  11. 2.2 3 km ESE of Strawberry, Arkansas
  12. 1.7 4 km SSW of Strawberry, Arkansas
  13. 1.7 Arkansas
  14. 1.5 5 km SE of Strawberry, Arkansas
  15. 1.7 4 km SE of Strawberry, 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.