QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2mb_lg

8 km NNE of Harper, Kansas

· 6.8 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 20 kmKingman County 26 kmSumner County 46 kmSedgwick County 59 kmBarber County 63 kmGrant County 66 kmReno County 66 kmPratt County 74 kmAlfalfa County 76 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 2.2 (mb_lg)
Depth
6.8 km below the surface
Felt
no reports yet
Nearest
Harper County, 20 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2398 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 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 37.3559, -97.9876. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 20 km (12 mi) NNE of here earthquakes near Harper County
Kingman County, KS 26 km (16 mi) SSE of here earthquakes near Kingman County
Sumner County, KS 46 km (28 mi) WNW of here earthquakes near Sumner County
Sedgwick County, KS 59 km (37 mi) SW of here earthquakes near Sedgwick County
Barber County, KS 63 km (39 mi) ENE of here earthquakes near Barber County
Grant County, OK 66 km (41 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

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

  1. 1.5 6 km SW of Manchester, Oklahoma
  2. 2.0 6 km SW of Manchester, Oklahoma
  3. 1.8 5 km SW of Manchester, Oklahoma
  4. 1.5 5 km SSW of Manchester, Oklahoma
  5. 1.6 5 km SW of Manchester, Oklahoma
  6. 1.7 5 km SW of Manchester, Oklahoma
  7. 1.6 5 km SW of Manchester, Oklahoma
  8. 1.6 5 km WSW of Manchester, Oklahoma
  9. 1.7 6 km SW of Manchester, Oklahoma
  10. 2.0 5 km SW of Manchester, Oklahoma
  11. 4.2 6 km SW of Manchester, Oklahoma
  12. 1.6 6 km SW of Manchester, Oklahoma
  13. 2.6 7 km NE of Mayfield, Kansas
  14. 2.1 9 km NE of Mayfield, Kansas
  15. 2.4 9 km NE of Mayfield, 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.