QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8mb_lg

9 km SSE of Spivey, Kansas

· 12 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 20 kmKingman County 21 kmBarber County 52 kmSumner County 58 kmPratt County 63 kmReno County 65 kmSedgwick County 68 kmGrant County 71 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 2.8 (mb_lg)
Depth
12 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Harper County, 20 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3524 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 37.3649, -98.1271. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 20 km (13 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 52 km (32 mi) ENE of here earthquakes near Barber County
Sumner County, KS 58 km (36 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

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

  1. 1.6 Kansas
  2. 1.8 9 km W of Bluff City, Kansas
  3. 1.8 5 km ESE of Freeport, Kansas
  4. 1.9 3 km SSE of Danville, Kansas
  5. 1.5 7 km S of Anthony, Kansas
  6. 1.6 7 km S of Anthony, Kansas
  7. 2.0 8 km N of Manchester, Oklahoma
  8. 2.0 3 km NNW of Freeport, Kansas
  9. 2.1 4 km NE of Bluff City, Kansas
  10. 2.5 8 km SSW of Cheney, Kansas
  11. 2.4 8 km SSW of Cheney, Kansas
  12. 1.6 4 km NNE of Anthony, Kansas
  13. 1.6 8 km NNW of Manchester, Oklahoma
  14. 1.6 1 km E of Danville, Kansas
  15. 1.6 3 km NNW 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.