QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

8 km NNW of Cotton Plant, Arkansas

· 13 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Woodruff County 12 kmPrairie County 38 kmMonroe County 46 kmWhite County 47 kmSt. Francis County 48 kmCross County 52 kmLee County 57 kmJackson County 57 kmLonoke County 67 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 1.9 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Woodruff County, 12 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 864 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 35.0843, -91.2773. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Woodruff County, AR 12 km (8 mi) SSW of here earthquakes near Woodruff County
Prairie County, AR 38 km (23 mi) NE of here earthquakes near Prairie County
Monroe County, AR 46 km (28 mi) N of here earthquakes near Monroe County
White County, AR 47 km (29 mi) ESE of here earthquakes near White County
St. Francis County, AR 48 km (30 mi) W of here earthquakes near St. Francis County
Cross County, AR 52 km (32 mi) WSW of here earthquakes near Cross County

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

Aftershocks so far

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

  1. 2.0 10 km WNW of Cotton Plant, Arkansas
  2. 2.3 9 km NW of Judsonia, Arkansas
  3. 2.1 3 km SW of Georgetown, 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.