QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km NW of Danville, Kansas

· 5.5 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 18 kmKingman County 33 kmSumner County 40 kmSedgwick County 58 kmGrant County 59 kmBarber County 67 kmReno County 72 kmAlfalfa 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
5.5 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Harper County, 18 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2696 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 37.3102, -97.9303. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 18 km (11 mi) NE of here earthquakes near Harper County
Kingman County, KS 33 km (20 mi) SE of here earthquakes near Kingman County
Sumner County, KS 40 km (25 mi) WNW of here earthquakes near Sumner County
Sedgwick County, KS 58 km (36 mi) SW of here earthquakes near Sedgwick County
Grant County, OK 59 km (37 mi) NNW of here earthquakes near Grant 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

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

  1. 1.9 Kansas
  2. 1.9 2 km SSE of Bluff City, Kansas
  3. 1.8 3 km ENE of Freeport, Kansas
  4. 1.6 3 km ENE of Freeport, Kansas
  5. 2.4 0 km S of Manchester, Oklahoma
  6. 2.4 6 km S of Harper, Kansas
  7. 2.3 9 km SSE of Milan, Kansas
  8. 2.7 10 km SSE of Milan, Kansas
  9. 2.5 4 km SSW of Harper, Kansas
  10. 1.9 4 km S of Harper, Kansas
  11. 1.9 2 km SE of Milan, Kansas
  12. 1.5 4 km WNW of Danville, Kansas
  13. 1.8 9 km W of Bluff City, Kansas
  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.