QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

7 km S of Anthony, Kansas

· 6.7 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 12 kmGrant County 40 kmAlfalfa County 47 kmSumner County 51 kmKingman County 53 kmBarber County 59 kmGarfield County 82 kmWoods County 83 kmSedgwick County 84 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 (ml)
Depth
6.7 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Harper County, 12 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3599 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 37.0870, -98.0397. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 12 km (7 mi) SSE of here earthquakes near Harper County
Grant County, OK 40 km (25 mi) NW of here earthquakes near Grant County
Alfalfa County, OK 47 km (29 mi) NNE of here earthquakes near Alfalfa County
Sumner County, KS 51 km (32 mi) WSW of here earthquakes near Sumner County
Kingman County, KS 53 km (33 mi) S of here earthquakes near Kingman County
Barber County, KS 59 km (37 mi) ESE of here earthquakes near Barber County

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

Aftershocks so far

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

  1. 1.8 7 km ENE of Caldwell, Kansas
  2. 1.8 10 km ESE of Bluff City, Kansas
  3. 2.6 6 km NNW of Jefferson, Oklahoma
  4. 1.9 9 km NNW of Caldwell, Kansas
  5. 2.7 5 km NE of Medford, Oklahoma
  6. 2.0 6 km ENE of Caldwell, Kansas
  7. 2.6 7 km WNW of Jet, Oklahoma
  8. 3.3 7 km NNE of Wakita, Oklahoma
  9. 1.6 6 km ENE of Caldwell, Kansas
  10. 2.7 6 km NNE of Wakita, Oklahoma
  11. 2.7 6 km ENE of Caldwell, Kansas
  12. 2.8 6 km NNE of Wakita, Oklahoma
  13. 3.5 6 km NNE of Wakita, Oklahoma
  14. 3.7 4 km NNW of Wakita, Oklahoma
  15. 3.9 6 km N of Wakita, 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.