QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

6 km WNW of Maynard, Arkansas

· 2.0 km deep · released about 150 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Randolph County 11 kmRipley County 26 kmLawrence County 45 kmOregon County 47 kmClay County 50 kmGreene County 50 kmSharp County 53 kmCarter County 57 kmButler County 60 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 2.5 (md)
Depth
2.0 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Randolph County, 11 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2558 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 150 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 72,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.5× the energy of this one
  4. This earthquake M 2.5 about 150 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 36.4338, -90.9722. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Randolph County, AR 11 km (7 mi) NNE of here earthquakes near Randolph County
Ripley County, MO 26 km (16 mi) SSW of here earthquakes near Ripley County
Lawrence County, AR 45 km (28 mi) NNE of here earthquakes near Lawrence County
Oregon County, MO 47 km (30 mi) SE of here earthquakes near Oregon County
Clay County, AR 50 km (31 mi) W of here earthquakes near Clay County
Greene County, AR 50 km (31 mi) NW of here earthquakes near Greene County

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

Aftershocks so far

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

  1. 1.7 2 km W of Powhatan, Arkansas
  2. 2.2 6 km WNW of Powhatan, Arkansas
  3. 1.8 6 km N of Black Rock, Arkansas
  4. 2.2 10 km W of Maynard, Arkansas
  5. 2.0 6 km NE of Ravenden Springs, Arkansas
  6. 2.0 6 km NNW of Black Rock, Arkansas
  7. 1.5 4 km NE of Black Rock, Arkansas
  8. 1.7 3 km WNW of Powhatan, Arkansas
  9. 1.6 5 km N of Black Rock, Arkansas
  10. 1.8 4 km WNW of Powhatan, Arkansas
  11. 2.3 Missouri-Arkansas border region
  12. 2.3 5 km SE of Grandin, Missouri
  13. 2.1 5 km N of Black Rock, Arkansas
  14. 2.4 6 km NNW of Doniphan, Missouri
  15. 2.7 6 km NNW of Doniphan, Missouri

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.