QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4 km N of Viola, Arkansas

· 5.0 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fulton County 16 kmBaxter County 36 kmHowell County 38 kmIzard County 39 kmOzark County 48 kmSharp County 55 kmOregon County 59 kmMarion County 65 kmStone 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
5.0 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Fulton County, 16 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2037 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 36.4388, -91.9838. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fulton County, AR 16 km (10 mi) WNW of here earthquakes near Fulton County
Baxter County, AR 36 km (22 mi) ENE of here earthquakes near Baxter County
Howell County, MO 38 km (24 mi) SSW of here earthquakes near Howell County
Izard County, AR 39 km (24 mi) N of here earthquakes near Izard County
Ozark County, MO 48 km (30 mi) ESE of here earthquakes near Ozark County
Sharp County, AR 55 km (34 mi) WNW of here earthquakes near Sharp County

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

Aftershocks so far

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

  1. 1.9 9 km SW of Koshkonong, Missouri
  2. 1.9 10 km NNE of Salem, Arkansas
  3. 2.3 11 km NNE of Salem, Arkansas
  4. 2.0 4 km N of Evening Shade, Arkansas
  5. 2.2 2 km WSW of Gainesville, Missouri
  6. 2.1 4 km N of Midway, Arkansas
  7. 2.2 7 km ENE of West Plains, Missouri
  8. 1.8 11 km WSW of Melbourne, Arkansas
  9. 2.2 6 km WNW of West Plains, Missouri
  10. 2.3 4 km SE of Franklin, Arkansas
  11. 2.2 4 km SE of Ash Flat, Arkansas
  12. 2.1 7 km ENE of Midway, Arkansas
  13. 2.1 5 km SE of Ash Flat, Arkansas
  14. 2.3 9 km NNW of Cherokee Village, 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.