QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

Earthquake near Heber Springs, AR

USGS: 6 km ENE of Greers Ferry, Arkansas

99 km (61 mi) NNE of Little Rock, AR

4:17 pm CDT, Jun 17, 2020 · · 4.2 km deep · released about 17 lb of TNT

Every earthquake near Heber Springs Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cleburne County 9 kmStone County 30 kmVan Buren County 37 kmWhite County 49 kmIndependence County 52 kmFaulkner County 53 kmIzard County 59 kmSearcy County 63 kmConway 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
4:17 pm CDT on 17 June 2020 ()
Where
13 km (8 mi) NNW of Heber Springs, AR · earthquakes near Heber Springs
Magnitude
M 1.8 (md)
Depth
4.2 km below the surface
Felt
no reports yet
Nearest
Cleburne County, 9 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2298 days ago

A magnitude 1.8 earthquake was recorded 13 km (8 mi) NNW of Heber Springs, AR, at 4:17 pm CDT on 17 June 2020 (21:17 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.

How big was it?

This earthquake released about 17 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 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 35.5897, -92.1080. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cleburne County, AR 9 km (6 mi) E earthquakes near Cleburne County
Stone County, AR 30 km (19 mi) N earthquakes near Stone County
Van Buren County, AR 37 km (23 mi) W earthquakes near Van Buren County
White County, AR 49 km (31 mi) SE earthquakes near White County
Independence County, AR 52 km (32 mi) ENE earthquakes near Independence County
Faulkner County, AR 53 km (33 mi) SSW earthquakes near Faulkner County

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

Aftershocks so far

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

  1. 2.4 11 km W of Clinton, Arkansas
  2. 2.3 9 km NW of Judsonia, Arkansas
  3. 2.2 12 km SSW of Pleasant Plains, Arkansas
  4. 1.8 11 km S of Pleasant Plains, Arkansas
  5. 2.9 11 km E of Pangburn, Arkansas
  6. 1.8 2 km WNW of Enola, Arkansas
  7. 1.9 13 km SSE of Guion, Arkansas
  8. 1.9 5 km W of Damascus, Arkansas
  9. 2.1 5 km NNE of Greenbrier, Arkansas
  10. 2.1 13 km SSW of Pleasant Plains, Arkansas
  11. 2.2 12 km SSW of Pleasant Plains, Arkansas
  12. 2.0 14 km SSW of Pleasant Plains, Arkansas
  13. 2.1 12 km SSW of Pleasant Plains, Arkansas
  14. 1.8 11 km SSW of Pleasant Plains, Arkansas
  15. 1.9 11 km SW of Pleasant Plains, 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.