QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5mb_lg

10 km NNE of Harper, 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 25 kmSumner County 46 kmSedgwick County 58 kmBarber County 64 kmReno County 65 kmGrant County 67 kmPratt County 73 kmAlfalfa County 77 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
7 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Harper County, 22 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2843 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 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 37.3710, -97.9840. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 22 km (13 mi) NNE of here earthquakes near Harper County
Kingman County, KS 25 km (15 mi) SE of here earthquakes near Kingman County
Sumner County, KS 46 km (29 mi) WNW of here earthquakes near Sumner County
Sedgwick County, KS 58 km (36 mi) SW of here earthquakes near Sedgwick County
Barber County, KS 64 km (40 mi) ENE of here earthquakes near Barber 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

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

  1. 1.9 2 km SSE of Bluff City, Kansas
  2. 1.6 3 km ENE of Freeport, Kansas
  3. 1.8 3 km E of Freeport, Kansas
  4. 2.2 7 km N of Wakita, Oklahoma
  5. 1.5 7 km ENE of Bluff City, Kansas
  6. 1.8 4 km WNW of Danville, Kansas
  7. 2.1 1 km ESE of Hazelton, Kansas
  8. 1.6 7 km N of Argonia, Kansas
  9. 1.5 3 km E of Freeport, Kansas
  10. 1.6 6 km SSE of Anthony, Kansas
  11. 3.1 8 km W of Bluff City, Kansas
  12. 1.7 5 km NW of Caldwell, Kansas
  13. 2.5 6 km N of Wakita, Oklahoma
  14. 1.7 7 km SE of Harper, Kansas
  15. 2.3 4 km SSW of Conway Springs, 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.