QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8mb_lg

2 km WNW of Danville, Kansas

· 5.0 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 18 kmKingman County 34 kmSumner County 38 kmGrant County 58 kmSedgwick County 59 kmBarber County 68 kmAlfalfa County 73 kmReno County 74 kmPratt 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 2.8 (mb_lg)
Depth
5.0 km below the surface
Felt
18 reports · strongest reported intensity III
Nearest
Harper County, 18 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2690 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 18 people have reported feeling it to USGS.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 37.2988, -97.9212. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 18 km (11 mi) NE of here earthquakes near Harper County
Kingman County, KS 34 km (21 mi) SE of here earthquakes near Kingman County
Sumner County, KS 38 km (24 mi) W of here earthquakes near Sumner County
Grant County, OK 58 km (36 mi) NNW of here earthquakes near Grant County
Sedgwick County, KS 59 km (37 mi) SW of here earthquakes near Sedgwick County
Barber County, KS 68 km (42 mi) E of here earthquakes near Barber County

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

Aftershocks so far

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

  1. 1.9 Kansas
  2. 1.9 2 km SSE of Bluff City, Kansas
  3. 1.8 3 km ENE of Freeport, Kansas
  4. 1.6 3 km ENE of Freeport, Kansas
  5. 2.4 0 km S of Manchester, Oklahoma
  6. 2.4 6 km S of Harper, Kansas
  7. 2.3 9 km SSE of Milan, Kansas
  8. 2.7 10 km SSE of Milan, Kansas
  9. 2.5 4 km SSW of Harper, Kansas
  10. 1.9 4 km S of Harper, Kansas
  11. 1.9 2 km SE of Milan, Kansas
  12. 2.6 7 km NNW of Medford, Oklahoma
  13. 1.5 4 km WNW of Danville, Kansas
  14. 2.5 7 km NNW of Medford, Oklahoma
  15. 1.8 9 km W of Bluff City, 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.