QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6mb_lg

6 km ENE of Attica, Kansas

· 5.0 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 13 kmKingman County 31 kmBarber County 47 kmSumner County 59 kmAlfalfa County 62 kmGrant County 64 kmPratt County 66 kmReno County 75 kmSedgwick County 77 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
5.0 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Harper County, 13 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3413 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

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 37.2751, -98.1630. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 13 km (8 mi) NW of here earthquakes near Harper County
Kingman County, KS 31 km (19 mi) S of here earthquakes near Kingman County
Barber County, KS 47 km (29 mi) E of here earthquakes near Barber County
Sumner County, KS 59 km (37 mi) W of here earthquakes near Sumner County
Alfalfa County, OK 62 km (39 mi) NNE of here earthquakes near Alfalfa County
Grant County, OK 64 km (39 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

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

  1. 1.9 11 km NNW of Caldwell, Kansas
  2. 1.8 11 km NNW of Caldwell, Kansas
  3. 1.6 12 km NNW of Caldwell, Kansas
  4. 1.6 11 km NNW of Caldwell, Kansas
  5. 3.0 10 km SSE of Waldron, Kansas
  6. 2.8 10 km SSE of Waldron, Kansas
  7. 2.5 10 km SSE of Waldron, Kansas
  8. 1.9 2 km WSW of Anthony, Kansas
  9. 2.1 11 km NNW of Caldwell, Kansas
  10. 2.7 12 km NNW of Caldwell, Kansas
  11. 2.4 2 km SW of Anthony, Kansas
  12. 1.7 9 km W of Bluff City, Kansas
  13. 2.0 9 km W of Bluff City, Kansas
  14. 1.9 10 km WNW of Caldwell, Kansas
  15. 2.5 10 km SSE of Waldron, 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.