QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

4 km SSE of Sidney, Arkansas

· 12 km deep · released about 150 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Independence County 26 kmSharp County 28 kmIzard County 28 kmStone County 46 kmFulton County 49 kmLawrence County 50 kmCleburne County 53 kmJackson County 56 kmRandolph County 69 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
12 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Independence County, 26 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2942 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 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 35.9648, -91.6452. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Independence County, AR 26 km (16 mi) NNW of here earthquakes near Independence County
Sharp County, AR 28 km (17 mi) SW of here earthquakes near Sharp County
Izard County, AR 28 km (17 mi) ESE of here earthquakes near Izard County
Stone County, AR 46 km (29 mi) ENE of here earthquakes near Stone County
Fulton County, AR 49 km (30 mi) SSE of here earthquakes near Fulton County
Lawrence County, AR 50 km (31 mi) W of here earthquakes near Lawrence County

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

Aftershocks so far

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

  1. 1.5 1 km W of Lynn, Arkansas
  2. 1.7 1 km WNW of Lynn, Arkansas
  3. 2.2 9 km NNW of Moorefield, Arkansas
  4. 2.0 3 km SW of Lynn, Arkansas
  5. 2.3 4 km SE of Franklin, Arkansas
  6. 2.1 2 km SSW of Lynn, Arkansas
  7. 1.9 5 km S of Imboden, Arkansas
  8. 2.0 3 km SSW of Imboden, Arkansas
  9. 3.1 4 km SSW of Imboden, Arkansas
  10. 1.9 2 km W of Lynn, Arkansas
  11. 2.3 6 km WSW of Ravenden, Arkansas
  12. 1.7 Missouri-Arkansas border region
  13. 1.7 2 km WSW of Imboden, Arkansas
  14. 2.1 2 km SE of Ravenden, Arkansas
  15. 1.9 3 km ESE of Ravenden, 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.