QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1mb_lg

10 km SSE of Spivey, Kansas

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 20 kmKingman County 21 kmBarber County 53 kmSumner County 57 kmPratt County 63 kmReno County 65 kmSedgwick County 68 kmGrant County 70 kmAlfalfa County 73 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
6.3 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Harper County, 20 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3424 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 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 37.3633, -98.1158. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 20 km (12 mi) NNW of here earthquakes near Harper County
Kingman County, KS 21 km (13 mi) S of here earthquakes near Kingman County
Barber County, KS 53 km (33 mi) ENE of here earthquakes near Barber County
Sumner County, KS 57 km (35 mi) WNW of here earthquakes near Sumner County
Pratt County, KS 63 km (39 mi) ESE of here earthquakes near Pratt County
Reno County, KS 65 km (40 mi) S of here earthquakes near Reno 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. 2.8 1 km ESE of Medicine Lodge, Kansas
  2. 1.6 5 km SSE of Freeport, Kansas
  3. 2.5 10 km SSE of Waldron, Kansas
  4. 3.1 10 km SSE of Waldron, Kansas
  5. 1.8 11 km NNW of Caldwell, Kansas
  6. 1.9 5 km SSE of Freeport, Kansas
  7. 2.7 Kansas
  8. 2.0 5 km SSE of Freeport, Kansas
  9. 2.6 5 km SSW of Bluff City, Kansas
  10. 1.5 8 km SW of Bluff City, Kansas
  11. 2.0 7 km ENE of Attica, Kansas
  12. 1.5 5 km SE of Freeport, Kansas
  13. 1.5 5 km SE of Freeport, Kansas
  14. 1.8 12 km SSW of Milan, Kansas
  15. 2.2 5 km SE 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.