QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

5 km S of Argonia, Kansas

· 7.9 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 24 kmHarper County 27 kmGrant County 48 kmKingman County 50 kmSedgwick County 58 kmKay County 71 kmAlfalfa County 74 kmBarber County 81 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
7.9 km below the surface
Felt
no reports yet
Nearest
Sumner County, 24 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3659 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 37.2200, -97.7683. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 24 km (15 mi) W of here earthquakes near Sumner County
Harper County, KS 27 km (17 mi) E of here earthquakes near Harper County
Grant County, OK 48 km (30 mi) N of here earthquakes near Grant County
Kingman County, KS 50 km (31 mi) SE of here earthquakes near Kingman County
Sedgwick County, KS 58 km (36 mi) SSW of here earthquakes near Sedgwick County
Kay County, OK 71 km (44 mi) NW of here earthquakes near Kay County

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

Aftershocks so far

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

  1. 1.9 7 km ESE of Bluff City, Kansas
  2. 1.7 Kansas
  3. 2.1 5 km SSE of Freeport, Kansas
  4. 1.9 5 km SSE of Freeport, Kansas
  5. 2.5 5 km SSE of Freeport, Kansas
  6. 1.7 9 km W of Bluff City, Kansas
  7. 1.7 9 km ESE of Bluff City, Kansas
  8. 1.5 9 km ESE of Bluff City, KS
  9. 1.6 5 km SSE of Freeport, Kansas
  10. 1.6 9 km W of Bluff City, Kansas
  11. 2.7 5 km SSE of Freeport, Kansas
  12. 3.5 5 km SSE of Freeport, Kansas
  13. 3.3 2 km WNW of Deer Creek, Oklahoma
  14. 2.2 0 km N of Manchester, Oklahoma
  15. 2.7 3 km ENE of Medford, 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.