QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

Missouri-Arkansas border region

· 9.6 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Randolph County 22 kmLawrence County 22 kmSharp County 23 kmOregon County 55 kmFulton County 57 kmRipley County 57 kmGreene County 60 kmIndependence County 61 kmIzard County 64 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 1.8 (md)
Depth
9.6 km below the surface
Felt
no reports yet
Nearest
Randolph County, 22 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1571 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 36.2170, -91.2207. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Randolph County, AR 22 km (14 mi) SW of here earthquakes near Randolph County
Lawrence County, AR 22 km (14 mi) NNW of here earthquakes near Lawrence County
Sharp County, AR 23 km (14 mi) ENE of here earthquakes near Sharp County
Oregon County, MO 55 km (34 mi) SSE of here earthquakes near Oregon County
Fulton County, AR 57 km (35 mi) ESE of here earthquakes near Fulton County
Ripley County, MO 57 km (36 mi) SSW of here earthquakes near Ripley County

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

Aftershocks so far

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

  1. 1.8 8 km SW of Williford, Arkansas
  2. 1.9 12 km SSW of Strawberry, Arkansas
  3. 1.8 3 km WNW of Lynn, Arkansas
  4. 2.1 6 km SSW of Strawberry, Arkansas
  5. 2.1 5 km N of Strawberry, Arkansas
  6. 2.1 5 km NW of Sidney, Arkansas
  7. 1.7 2 km WNW of Lynn, Arkansas
  8. 2.3 11 km NW of Strawberry, Arkansas
  9. 1.6 1 km W of Lynn, Arkansas
  10. 2.3 5 km SE of Imboden, Arkansas
  11. 2.0 6 km N of Black Rock, Arkansas
  12. 2.1 8 km NE of Smithville, Arkansas
  13. 2.0 4 km NNW of Minturn, Arkansas
  14. 1.9 12 km WNW of Smithville, Arkansas
  15. 1.8 2 km SW 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.