QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

12 km NNW of Caldwell, Kansas

· 4.7 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 20 kmHarper County 35 kmGrant County 40 kmKay County 59 kmKingman County 62 kmSedgwick County 64 kmAlfalfa County 73 kmCowley County 75 kmGarfield County 85 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
4.7 km below the surface
Felt
no reports yet
Nearest
Sumner County, 20 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3805 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 37.1350, -97.6737. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 20 km (12 mi) SW of here earthquakes near Sumner County
Harper County, KS 35 km (22 mi) E of here earthquakes near Harper County
Grant County, OK 40 km (25 mi) NNE of here earthquakes near Grant County
Kay County, OK 59 km (37 mi) NW of here earthquakes near Kay County
Kingman County, KS 62 km (39 mi) SE of here earthquakes near Kingman County
Sedgwick County, KS 64 km (39 mi) SSW of here earthquakes near Sedgwick County

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

Aftershocks so far

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

  1. 2.7 2 km NNW of Lamont, Oklahoma
  2. 1.6 1 km WNW of Danville, Kansas
  3. 3.0 4 km SSE of Braman, Oklahoma
  4. 1.9 2 km S of Anthony, Kansas
  5. 1.6 2 km SSW of Anthony, Kansas
  6. 1.5 4 km SW of Bluff City, Kansas
  7. 2.5 6 km SE of Milan, Kansas
  8. 2.0 7 km SE of Milan, Kansas
  9. 3.0 5 km W of Medford, Oklahoma
  10. 2.6 1 km W of Braman, Oklahoma
  11. 3.0 1 km WSW of Braman, Oklahoma
  12. 2.4 7 km SE of Harper, Kansas
  13. 3.4 3 km WNW of Freeport, Kansas
  14. 1.6 11 km W of Caldwell, Kansas
  15. 2.0 11 km W of Caldwell, 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.