QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

Earthquake near Conway, AR

USGS: 7 km N of Quitman, Arkansas

82 km (51 mi) N of Little Rock, AR · 48 km (30 mi) NNE of Conway, AR

4:10 am CST, Dec 19, 2021 · · 3.2 km deep · released about 85 lb of TNT

Every earthquake near Conway Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cleburne County 24 kmVan Buren County 31 kmFaulkner County 36 kmStone County 45 kmWhite County 48 kmConway County 48 kmSearcy County 66 kmIndependence County 67 kmPope County 73 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
4:10 am CST on 19 December 2021 ()
Where
45 km (28 mi) NNE of Conway, AR · earthquakes near Conway
Magnitude
M 2.3 (md)
Depth
3.2 km below the surface
Felt
no reports yet
Nearest
Cleburne County, 24 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1749 days ago

A magnitude 2.3 earthquake was recorded 45 km (28 mi) NNE of Conway, AR, at 4:10 am CST on 19 December 2021 (10:10 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Fairfield Bay, Heber Springs, Clinton, Greenbrier.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 35.4537, -92.2175. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cleburne County, AR 24 km (15 mi) NE earthquakes near Cleburne County
Van Buren County, AR 31 km (19 mi) WNW earthquakes near Van Buren County
Faulkner County, AR 36 km (22 mi) SSW earthquakes near Faulkner County
Stone County, AR 45 km (28 mi) N earthquakes near Stone County
White County, AR 48 km (30 mi) ESE earthquakes near White County
Conway County, AR 48 km (30 mi) WSW earthquakes near Conway County

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

Aftershocks so far

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

  1. 2.1 3 km E of Enola, Arkansas
  2. 1.8 3 km NNE of Tumbling Shoals, Arkansas
  3. 2.3 3 km NW of Mount Vernon, Arkansas
  4. 2.2 11 km SSW of Pleasant Plains, Arkansas
  5. 1.9 11 km SSW of Pleasant Plains, Arkansas
  6. 1.9 11 km SSW of Pleasant Plains, Arkansas
  7. 1.9 13 km SSW of Pleasant Plains, Arkansas
  8. 2.1 11 km SW of Pleasant Plains, Arkansas
  9. 2.1 12 km SSW of Pleasant Plains, Arkansas
  10. 2.3 12 km ENE of Pangburn, Arkansas
  11. 1.7 8 km SW of Heber Springs, Arkansas
  12. 2.3 3 km NE of Greenbrier, Arkansas
  13. 2.0 3 km SSE of Guy, Arkansas
  14. 2.4 11 km W of Clinton, Arkansas
  15. 2.3 9 km NW of Judsonia, 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.