QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5mb_lg

10 km SSW of Spivey, Kansas

· 5.0 km deep · released about 2.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 22 kmKingman County 22 kmBarber County 46 kmPratt County 58 kmSumner County 63 kmReno County 67 kmAlfalfa County 70 kmGrant County 73 kmSedgwick County 74 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 3.5 (mb_lg)
Depth
5.0 km below the surface
Felt
2 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Harper County, 22 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1516 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 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× 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 37.3553, -98.1952. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 22 km (14 mi) NNW of here earthquakes near Harper County
Kingman County, KS 22 km (14 mi) SSW of here earthquakes near Kingman County
Barber County, KS 46 km (28 mi) ENE of here earthquakes near Barber County
Pratt County, KS 58 km (36 mi) SE of here earthquakes near Pratt County
Sumner County, KS 63 km (39 mi) WNW of here earthquakes near Sumner County
Reno County, KS 67 km (41 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

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

  1. 1.5 7 km S of Anthony, Kansas
  2. 2.0 5 km SW of Harper, Kansas
  3. 1.6 7 km E of Bluff City, Kansas
  4. 1.6 7 km E of Bluff City, Kansas
  5. 2.2 2 km S of Anthony, Kansas
  6. 1.7 6 km E of Manchester, Oklahoma
  7. 2.2 7 km SW of Danville, Kansas
  8. 2.2 5 km SSE of Bluff City, Kansas
  9. 2.7 5 km SSE of Bluff City, Kansas
  10. 2.1 5 km SSE of Bluff City, Kansas
  11. 2.4 5 km SSE of Bluff City, Kansas
  12. 1.9 3 km SSE of Danville, Kansas
  13. 2.8 7 km S of Anthony, Kansas
  14. 2.9 3 km SSE of Bluff City, KS
  15. 1.6 6 km SW of Danville, 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.