QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

10 km ESE of Bluff City, Kansas

· 3.1 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 29 kmHarper County 31 kmSumner County 31 kmKay County 61 kmAlfalfa County 61 kmKingman County 65 kmSedgwick County 75 kmGarfield County 75 kmBarber 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
3.1 km below the surface
Felt
no reports yet
Nearest
Grant County, 29 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3650 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 37.0525, -97.7625. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 29 km (18 mi) N of here earthquakes near Grant County
Harper County, KS 31 km (19 mi) ESE of here earthquakes near Harper County
Sumner County, KS 31 km (20 mi) SW of here earthquakes near Sumner County
Kay County, OK 61 km (38 mi) WNW of here earthquakes near Kay County
Alfalfa County, OK 61 km (38 mi) NE of here earthquakes near Alfalfa County
Kingman County, KS 65 km (40 mi) SSE of here earthquakes near Kingman County

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

Aftershocks so far

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

  1. 2.8 5 km NNE of Wakita, Oklahoma
  2. 1.8 2 km E of Anthony, Kansas
  3. 2.5 8 km ESE of Wakita, Oklahoma
  4. 1.7 4 km ENE of Harper, Kansas
  5. 1.5 4 km ENE of Harper, Kansas
  6. 2.7 9 km SE of Wakita, Oklahoma
  7. 2.6 3 km ESE of Byron, Oklahoma
  8. 2.7 8 km WNW of Deer Creek, Oklahoma
  9. 1.9 11 km WNW of Caldwell, Kansas
  10. 2.3 7 km WNW of Renfrow, Oklahoma
  11. 2.7 2 km NW of Deer Creek, Oklahoma
  12. 3.6 2 km NW of Deer Creek, Oklahoma
  13. 1.5 9 km WSW of Hunnewell, Kansas
  14. 2.0 12 km SSW of Milan, Kansas
  15. 2.7 8 km W of Hunnewell, 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.