QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km WNW of Danville, 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 17 kmKingman County 33 kmSumner County 40 kmGrant County 59 kmSedgwick County 59 kmBarber County 67 kmAlfalfa County 72 kmReno County 73 kmPratt County 81 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, 17 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2774 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× 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 37.3022, -97.9358. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 17 km (11 mi) NE of here earthquakes near Harper County
Kingman County, KS 33 km (21 mi) SSE of here earthquakes near Kingman County
Sumner County, KS 40 km (25 mi) W of here earthquakes near Sumner County
Grant County, OK 59 km (36 mi) NNW of here earthquakes near Grant County
Sedgwick County, KS 59 km (37 mi) SW of here earthquakes near Sedgwick County
Barber County, KS 67 km (42 mi) E of here earthquakes near Barber County

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

Aftershocks so far

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

  1. 2.5 4 km SSW of Harper, Kansas
  2. 1.9 4 km S of Harper, Kansas
  3. 1.9 2 km SE of Milan, Kansas
  4. 1.5 4 km WNW of Danville, Kansas
  5. 1.8 9 km W of Bluff City, Kansas
  6. 1.7 7 km ENE of Bluff City, Kansas
  7. 1.8 9 km W of Bluff City, Kansas
  8. 2.5 9 km W of Bluff City, Kansas
  9. 1.6 4 km WNW of Danville, Kansas
  10. 1.6 2 km SSE of Bluff City, Kansas
  11. 1.8 2 km WSW of Anthony, Kansas
  12. 1.6 11 km SSE of Waldron, Kansas
  13. 2.0 0 km SW of Wakita, Oklahoma
  14. 1.7 7 km ENE of Bluff City, Kansas
  15. 1.8 9 km W of Bluff City, 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.