QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Arkansas

· 10 km deep · released about 64 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Van Buren County 23 kmStone County 25 kmSearcy County 31 kmCleburne County 40 kmIzard County 57 kmBaxter County 57 kmMarion County 61 kmConway County 62 kmPope 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 2.2 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Van Buren County, 23 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2054 days ago

A magnitude 2.2 earthquake was recorded at Arkansas at 07:14 UTC on 2021-02-16. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Clinton, Fairfield Bay, Marshall, Mountain View.

How big was it?

This earthquake released about 64 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 64 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 35.7663, -92.3928. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Van Buren County, AR 23 km (14 mi) SSW earthquakes near Van Buren County
Stone County, AR 25 km (15 mi) ENE earthquakes near Stone County
Searcy County, AR 31 km (19 mi) WNW earthquakes near Searcy County
Cleburne County, AR 40 km (25 mi) ESE earthquakes near Cleburne County
Izard County, AR 57 km (35 mi) NE earthquakes near Izard County
Baxter County, AR 57 km (36 mi) N earthquakes near Baxter County

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

Aftershocks so far

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

  1. 2.0 17 km NNE of Hector, Arkansas
  2. 1.8 3 km NNE of Tumbling Shoals, Arkansas
  3. 1.7 8 km SW of Heber Springs, Arkansas
  4. 2.2 14 km NE of Pelsor, Arkansas
  5. 2.3 14 km NE of Pelsor, Arkansas
  6. 2.4 14 km NE of Pelsor, Arkansas
  7. 2.4 11 km W of Clinton, Arkansas
  8. 1.9 13 km SSE of Guion, Arkansas
  9. 1.9 5 km W of Damascus, Arkansas
  10. 2.0 Arkansas
  11. 2.3 6 km ESE of Center Ridge, Arkansas
  12. 1.9 16 km NE of Hector, Arkansas
  13. 1.8 11 km WSW of Melbourne, Arkansas
  14. 2.1 6 km WSW of Leslie, Arkansas
  15. 2.4 10 km NE of Damascus, 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.