QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1mb_lg

7 km NE of Harper, Kansas

· 5.3 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 19 kmKingman County 28 kmSumner County 44 kmSedgwick County 59 kmGrant County 64 kmBarber County 64 kmReno County 68 kmAlfalfa County 75 kmPratt 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 3.1 (mb_lg)
Depth
5.3 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Harper County, 19 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1511 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 37.3406, -97.9786. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 19 km (12 mi) NNE of here earthquakes near Harper County
Kingman County, KS 28 km (17 mi) SSE of here earthquakes near Kingman County
Sumner County, KS 44 km (28 mi) WNW of here earthquakes near Sumner County
Sedgwick County, KS 59 km (37 mi) SW of here earthquakes near Sedgwick County
Grant County, OK 64 km (40 mi) NNW of here earthquakes near Grant County
Barber County, KS 64 km (40 mi) ENE of here earthquakes near Barber County

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

Aftershocks so far

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

  1. 1.7 3 km WSW of Anthony, Kansas
  2. 3.2 9 km NNE of Harper, Kansas
  3. 1.8 4 km E of Bluff City, Kansas
  4. 1.9 Kansas
  5. 1.7 10 km SE of Freeport, Kansas
  6. 3.1 4 km N of Wakita, Oklahoma
  7. 1.9 7 km NNW of Argonia, Kansas
  8. 2.2 3 km E of Freeport, Kansas
  9. 2.7 9 km NNE of Harper, Kansas
  10. 2.8 8 km NNE of Harper, Kansas
  11. 3.0 11 km NE of Wakita, Oklahoma
  12. 2.5 8 km ESE of Manchester, Oklahoma
  13. 2.3 11 km NE of Wakita, Oklahoma
  14. 1.6 11 km NE of Wakita, Oklahoma
  15. 1.9 11 km NE of Wakita, Oklahoma

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.