QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6mb_lg

8 km NNE of Harper, Kansas

· 6.6 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 19 kmKingman County 27 kmSumner County 45 kmSedgwick County 59 kmBarber County 64 kmGrant County 65 kmReno County 67 kmPratt County 75 kmAlfalfa County 75 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 2.6 (mb_lg)
Depth
6.6 km below the surface
Felt
no reports yet
Nearest
Harper County, 19 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2972 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 37.3489, -97.9789. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 19 km (12 mi) NNE of here earthquakes near Harper County
Kingman County, KS 27 km (17 mi) SSE of here earthquakes near Kingman County
Sumner County, KS 45 km (28 mi) WNW of here earthquakes near Sumner County
Sedgwick County, KS 59 km (36 mi) SW of here earthquakes near Sedgwick County
Barber County, KS 64 km (40 mi) ENE of here earthquakes near Barber County
Grant County, OK 65 km (40 mi) NNW of here earthquakes near Grant County

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

Aftershocks so far

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

  1. 2.4 3 km NW of Freeport, Kansas
  2. 1.9 3 km NW of Freeport, Kansas
  3. 1.5 7 km NNE of Danville, Kansas
  4. 2.5 7 km NE of Danville, Kansas
  5. 1.9 3 km NE of Manchester, Oklahoma
  6. 2.3 7 km NNE of Danville, Kansas
  7. 1.6 7 km NNE of Danville, Kansas
  8. 1.6 7 km NNE of Danville, Kansas
  9. 2.6 10 km NNW of Danville, Kansas
  10. 1.7 7 km NNE of Danville, Kansas
  11. 2.0 7 km SE of Harper, Kansas
  12. 1.7 7 km NNE of Danville, Kansas
  13. 3.0 8 km NNE of Harper, Kansas
  14. 2.0 4 km E of Bluff City, Kansas
  15. 2.5 5 km E 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.