QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

7 km S of Anthony, Kansas

· 5.6 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 12 kmGrant County 40 kmAlfalfa County 47 kmSumner County 51 kmKingman County 53 kmBarber County 60 kmGarfield County 82 kmSedgwick County 83 kmWoods County 84 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 (ml)
Depth
5.6 km below the surface
Felt
no reports yet
Nearest
Harper County, 12 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3635 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 13 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 37.0873, -98.0340. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 12 km (7 mi) SSE of here earthquakes near Harper County
Grant County, OK 40 km (25 mi) NNW of here earthquakes near Grant County
Alfalfa County, OK 47 km (29 mi) NNE of here earthquakes near Alfalfa County
Sumner County, KS 51 km (32 mi) WSW of here earthquakes near Sumner County
Kingman County, KS 53 km (33 mi) S of here earthquakes near Kingman County
Barber County, KS 60 km (37 mi) ESE of here earthquakes near Barber County

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

Aftershocks so far

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

  1. 2.0 1 km NNE of Manchester, Oklahoma
  2. 3.2 6 km SE of Nescatunga, Oklahoma
  3. 2.9 6 km E of Nescatunga, Oklahoma
  4. 3.0 7 km E of Nescatunga, Oklahoma
  5. 2.6 6 km E of Nescatunga, Oklahoma
  6. 2.9 6 km E of Nescatunga, Oklahoma
  7. 2.9 6 km E of Nescatunga, Oklahoma
  8. 1.8 9 km SE of Bluff City, Kansas
  9. 2.3 9 km SE of Bluff City, Kansas
  10. 1.6 2 km E of Anthony, Kansas
  11. 2.2 2 km SE of Milan, Kansas
  12. 2.7 7 km WNW of Jet, Oklahoma
  13. 2.5 7 km ESE of Medford, Oklahoma
  14. 2.6 6 km N of Wakita, Oklahoma
  15. 1.6 2 km SSW of Anthony, Kansas

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.