QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

11 km W of Caldwell, Kansas

· 6.0 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 29 kmSumner County 30 kmHarper County 33 kmKay County 58 kmAlfalfa County 63 kmKingman County 67 kmSedgwick County 74 kmGarfield County 75 kmCowley County 82 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 1.8 (ml)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Grant County, 29 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3779 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 37.0485, -97.7332. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 29 km (18 mi) N of here earthquakes near Grant County
Sumner County, KS 30 km (19 mi) SW of here earthquakes near Sumner County
Harper County, KS 33 km (21 mi) ESE of here earthquakes near Harper County
Kay County, OK 58 km (36 mi) WNW of here earthquakes near Kay County
Alfalfa County, OK 63 km (39 mi) NE of here earthquakes near Alfalfa County
Kingman County, KS 67 km (42 mi) SSE of here earthquakes near Kingman 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 11 km N of Nescatunga, Oklahoma
  2. 3.2 11 km N of Nescatunga, Oklahoma
  3. 1.6 11 km W of Caldwell, Kansas
  4. 2.0 11 km W of Caldwell, Kansas
  5. 3.0 4 km SSE of Braman, Oklahoma
  6. 2.8 8 km W of Deer Creek, Oklahoma
  7. 3.0 7 km WSW of Wakita, Oklahoma
  8. 1.8 11 km W of Caldwell, Kansas
  9. 2.8 9 km ESE of Jefferson, Oklahoma
  10. 1.7 6 km NW of Mayfield, Kansas
  11. 1.9 1 km WSW of Freeport, Kansas
  12. 2.7 9 km W of Deer Creek, Oklahoma
  13. 2.8 2 km WSW of Renfrow, Oklahoma
  14. 2.4 1 km WSW of Freeport, Kansas
  15. 2.0 1 km WSW 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.