QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

3 km WNW of Freeport, Kansas

· 4.1 km deep · released about 1.9 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 16 kmSumner County 35 kmKingman County 44 kmGrant County 48 kmSedgwick County 65 kmAlfalfa County 66 kmBarber County 71 kmKay County 79 kmReno County 84 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 3.4 (ml)
Depth
4.1 km below the surface
Felt
no reports yet
Measured shaking
intensity IV (ShakeMap)
Nearest
Harper County, 16 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3722 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 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 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 37.2093, -97.8890. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 16 km (10 mi) E of here earthquakes near Harper County
Sumner County, KS 35 km (22 mi) W of here earthquakes near Sumner County
Kingman County, KS 44 km (28 mi) SSE of here earthquakes near Kingman County
Grant County, OK 48 km (30 mi) N of here earthquakes near Grant County
Sedgwick County, KS 65 km (40 mi) SW 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

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

  1. 2.3 7 km SW of Bluff City, Kansas
  2. 1.7 4 km NE of Anthony, Kansas
  3. 1.9 5 km ENE of Danville, Kansas
  4. 1.6 2 km S of Caldwell, Kansas
  5. 1.5 2 km S of Caldwell, Kansas
  6. 2.2 7 km SW of Bluff City, Kansas
  7. 2.2 5 km E of Manchester, Oklahoma
  8. 1.6 6 km NW of Harper, Kansas
  9. 2.8 7 km NE of Wakita, Oklahoma
  10. 1.8 6 km S of Anthony, Kansas
  11. 1.5 11 km WNW of Caldwell, Kansas
  12. 1.7 8 km SSE of Anthony, Kansas
  13. 2.0 6 km SW of Manchester, Oklahoma
  14. 2.8 11 km WNW of Caldwell, Kansas
  15. 2.7 13 km N of Nescatunga, 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.