QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

8 km SE of Conway Springs, Kansas

· 5.0 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 14 kmSedgwick County 39 kmHarper County 47 kmKingman County 56 kmGrant County 65 kmCowley County 66 kmKay County 70 kmHarvey County 79 kmButler County 80 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
5.0 km below the surface
Felt
no reports yet
Nearest
Sumner County, 14 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3298 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 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 37.3457, -97.5703. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 14 km (9 mi) NNW of here earthquakes near Sumner County
Sedgwick County, KS 39 km (24 mi) SSW of here earthquakes near Sedgwick County
Harper County, KS 47 km (29 mi) ENE of here earthquakes near Harper County
Kingman County, KS 56 km (35 mi) ESE of here earthquakes near Kingman County
Grant County, OK 65 km (40 mi) NNE of here earthquakes near Grant County
Cowley County, KS 66 km (41 mi) W of here earthquakes near Cowley County

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

Aftershocks so far

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

  1. 1.6 4 km ENE of Milan, Kansas
  2. 3.2 1 km SE of Renfrow, Oklahoma
  3. 1.8 3 km E of Freeport, Kansas
  4. 1.7 3 km E of Freeport, Kansas
  5. 1.5 2 km SE of Milan, Kansas
  6. 2.0 5 km E of Harper, Kansas
  7. 1.8 7 km N of Argonia, Kansas
  8. 2.3 6 km NW of Renfrow, Oklahoma
  9. 1.7 1 km NE of Bluff City, Kansas
  10. 2.6 6 km NW of Renfrow, Oklahoma
  11. 3.3 6 km NW of Renfrow, Oklahoma
  12. 2.4 1 km ENE of Bluff City, Kansas
  13. 1.8 9 km NNE of Manchester, Oklahoma
  14. 2.7 11 km E of Belle Plaine, KS
  15. 3.1 1 km S of Renfrow, 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.