QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

4 km ENE of Caldwell, Kansas

· 5.5 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 22 kmGrant County 35 kmKay County 44 kmHarper County 48 kmCowley County 67 kmSedgwick County 72 kmGarfield County 77 kmAlfalfa County 77 kmKingman 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 2.1 (ml)
Depth
5.5 km below the surface
Felt
no reports yet
Nearest
Sumner County, 22 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3798 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 38 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 37.0413, -97.5540. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 22 km (14 mi) SSW of here earthquakes near Sumner County
Grant County, OK 35 km (22 mi) NE of here earthquakes near Grant County
Kay County, OK 44 km (28 mi) NW of here earthquakes near Kay County
Harper County, KS 48 km (30 mi) ESE of here earthquakes near Harper County
Cowley County, KS 67 km (42 mi) WSW of here earthquakes near Cowley County
Sedgwick County, KS 72 km (44 mi) S of here earthquakes near Sedgwick County

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

Aftershocks so far

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

  1. 2.6 12 km WSW of Wakita, Oklahoma
  2. 3.0 7 km SE of Manchester, Oklahoma
  3. 2.9 10 km ESE of Jefferson, Oklahoma
  4. 2.1 3 km WNW of Freeport, Kansas
  5. 2.3 11 km WNW of Caldwell, Kansas
  6. 1.7 8 km NE of Anthony, Kansas
  7. 2.0 8 km NE of Anthony, Kansas
  8. 3.1 3 km ENE of Medford, Oklahoma
  9. 2.8 9 km E of Medford, Oklahoma
  10. 1.5 6 km ENE of Anthony, Kansas
  11. 2.7 4 km SSE of Braman, Oklahoma
  12. 2.7 8 km ESE of Pond Creek, Oklahoma
  13. 3.1 8 km W of Deer Creek, Oklahoma
  14. 2.0 4 km NNE of Anthony, Kansas
  15. 1.6 4 km NNE of Anthony, 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.