QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

9 km NNW of Ravenden Springs, Arkansas

· 8.2 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Randolph County 23 kmSharp County 29 kmOregon County 35 kmLawrence County 41 kmRipley County 46 kmFulton County 48 kmIzard County 66 kmCarter County 69 kmHowell County 70 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
8.2 km below the surface
Felt
no reports yet
Nearest
Randolph County, 23 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1277 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 36.3857, -91.2777. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Randolph County, AR 23 km (14 mi) WNW of here earthquakes near Randolph County
Sharp County, AR 29 km (18 mi) NE of here earthquakes near Sharp County
Oregon County, MO 35 km (22 mi) SSE of here earthquakes near Oregon County
Lawrence County, AR 41 km (26 mi) NNW of here earthquakes near Lawrence County
Ripley County, MO 46 km (29 mi) SW of here earthquakes near Ripley County
Fulton County, AR 48 km (30 mi) E of here earthquakes near Fulton County

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

Aftershocks so far

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

  1. 1.8 2 km W of Lynn, Arkansas
  2. 1.7 3 km WNW of Lynn, Arkansas
  3. 2.2 4 km SSE of Maynard, Arkansas
  4. 2.1 3 km WNW of Lynn, Arkansas
  5. 2.0 4 km NW of Lynn, Arkansas
  6. 1.9 4 km NW of Lynn, Arkansas
  7. 1.5 3 km WNW of Lynn, Arkansas
  8. 1.8 2 km W of Lynn, Arkansas
  9. 2.0 3 km WNW of Lynn, Arkansas
  10. 1.8 9 km ESE of Ash Flat, Arkansas
  11. 2.0 8 km ESE of Ash Flat, Arkansas
  12. 2.1 6 km ENE of Smithville, Arkansas
  13. 1.9 10 km NNE of Salem, Arkansas
  14. 2.3 11 km NNE of Salem, Arkansas
  15. 1.9 10 km W 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.