QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

3 km SW of Anthony, Kansas

· 4.1 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 6 kmGrant County 45 kmKingman County 48 kmAlfalfa County 51 kmSumner County 51 kmBarber County 57 kmSedgwick County 81 kmPratt County 84 kmWoods County 85 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 1.5 (ml)
Depth
4.1 km below the surface
Felt
no reports yet
Nearest
Harper County, 6 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3539 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 37.1307, -98.0535. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 6 km (4 mi) S of here earthquakes near Harper County
Grant County, OK 45 km (28 mi) NNW of here earthquakes near Grant County
Kingman County, KS 48 km (30 mi) S of here earthquakes near Kingman County
Alfalfa County, OK 51 km (31 mi) NNE of here earthquakes near Alfalfa County
Sumner County, KS 51 km (32 mi) WSW of here earthquakes near Sumner County
Barber County, KS 57 km (35 mi) E of here earthquakes near Barber County

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

Aftershocks so far

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

  1. 1.6 5 km NW of Mayfield, Kansas
  2. 1.7 5 km SW of Mayfield, Kansas
  3. 1.6 5 km NW of Mayfield, Kansas
  4. 1.9 7 km NE of Anthony, Kansas
  5. 1.5 Kansas
  6. 1.9 5 km SW of Mayfield, Kansas
  7. 2.1 5 km SW of Mayfield, Kansas
  8. 1.9 8 km ENE of Caldwell, Kansas
  9. 1.6 8 km ENE of Caldwell, Kansas
  10. 1.9 8 km ENE of Caldwell, Kansas
  11. 1.9 5 km SE of Freeport, Kansas
  12. 2.0 5 km SW of Mayfield, Kansas
  13. 1.5 4 km ESE of Manchester, Oklahoma
  14. 1.7 6 km SSE of Anthony, Kansas
  15. 2.6 8 km WNW of Medford, 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.