QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

5 km SE of Freeport, Kansas

· 4.9 km deep · released about 77 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 23 kmSumner County 29 kmGrant County 42 kmKingman County 53 kmSedgwick County 66 kmAlfalfa County 66 kmKay County 71 kmBarber County 78 kmCowley County 87 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 2.3 (ml)
Depth
4.9 km below the surface
Felt
no reports yet
Nearest
Harper County, 23 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3721 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 77 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 77 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 37.1612, -97.8098. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 23 km (14 mi) E of here earthquakes near Harper County
Sumner County, KS 29 km (18 mi) WSW of here earthquakes near Sumner County
Grant County, OK 42 km (26 mi) N of here earthquakes near Grant County
Kingman County, KS 53 km (33 mi) SE of here earthquakes near Kingman County
Sedgwick County, KS 66 km (41 mi) SSW of here earthquakes near Sedgwick County
Alfalfa County, OK 66 km (41 mi) NE of here earthquakes near Alfalfa County

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

Aftershocks so far

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

  1. 2.8 7 km S of Anthony, Kansas
  2. 2.9 3 km SSE of Bluff City, KS
  3. 1.6 6 km SW of Danville, Kansas
  4. 1.6 4 km NNE of Anthony, Kansas
  5. 3.5 7 km SSW of Cheney, Kansas
  6. 1.5 6 km ENE of Anthony, Kansas
  7. 1.5 6 km ENE of Milan, Kansas
  8. 1.8 5 km S of Harper, Kansas
  9. 1.8 2 km SE of Milan, Kansas
  10. 3.0 8 km WSW of Deer Creek, Oklahoma
  11. 1.6 3 km SSE of Danville, Kansas
  12. 3.5 9 km W of Deer Creek, Oklahoma
  13. 1.6 3 km WNW of Freeport, Kansas
  14. 1.5 3 km ENE of Freeport, Kansas
  15. 1.6 3 km ENE of Freeport, 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.