QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

18 km WNW of Maynard, Arkansas

· 7.1 km deep · released about 44 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Randolph County 16 kmRipley County 27 kmOregon County 36 kmSharp County 48 kmLawrence County 49 kmCarter County 53 kmClay County 61 kmGreene County 62 kmFulton 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 2.1 (md)
Depth
7.1 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Randolph County, 16 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1499 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 44 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 36.4797, -91.0897. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Randolph County, AR 16 km (10 mi) NNW of here earthquakes near Randolph County
Ripley County, MO 27 km (17 mi) SW of here earthquakes near Ripley County
Oregon County, MO 36 km (22 mi) SE of here earthquakes near Oregon County
Sharp County, AR 48 km (30 mi) NE of here earthquakes near Sharp County
Lawrence County, AR 49 km (30 mi) N of here earthquakes near Lawrence County
Carter County, MO 53 km (33 mi) SSW of here earthquakes near Carter County

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

Aftershocks so far

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

  1. 1.8 9 km W of Maynard, Arkansas
  2. 2.2 4 km SSE of Maynard, Arkansas
  3. 2.0 8 km ESE of Ash Flat, Arkansas
  4. 2.1 6 km ENE of Smithville, Arkansas
  5. 1.7 10 km NW of Smithville, Arkansas
  6. 2.9 12 km WSW of Grandin, Missouri
  7. 2.2 13 km W of Maynard, 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. 2.5 4 km E of Doniphan, Missouri
  12. 2.7 5 km E of Doniphan, Missouri
  13. 2.3 5 km SE of Imboden, Arkansas
  14. 2.0 6 km N of Black Rock, Arkansas
  15. 2.1 8 km NE of Smithville, 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.