QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9mwr

5 km NNE of Danville, Kansas

· 5.0 km deep · released about 11 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 24 kmKingman County 35 kmSumner County 35 kmSedgwick County 52 kmGrant County 61 kmReno County 71 kmBarber County 74 kmAlfalfa County 79 kmPratt 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 3.9 (mwr)
Depth
5.0 km below the surface
Felt
28 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
Nearest
Harper County, 24 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2383 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 28 people have reported feeling it to USGS.

How big was it?

This earthquake released about 11 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 16,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 710× the energy of this one
  3. Magna, Utah 2020 M 5.7 500× the energy of this one
  4. This earthquake M 3.9 about 11 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 22× more

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 37.3356, -97.8648. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 24 km (15 mi) NE of here earthquakes near Harper County
Kingman County, KS 35 km (21 mi) SE of here earthquakes near Kingman County
Sumner County, KS 35 km (22 mi) WNW of here earthquakes near Sumner County
Sedgwick County, KS 52 km (33 mi) SW of here earthquakes near Sedgwick County
Grant County, OK 61 km (38 mi) N of here earthquakes near Grant County
Reno County, KS 71 km (44 mi) SSE of here earthquakes near Reno 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. 3.5 10 km NNE of Harper, Kansas
  2. 1.5 11 km SE of Mayfield, Kansas
  3. 1.9 11 km SE of Mayfield, Kansas
  4. 3.0 11 km SE of Mayfield, Kansas
  5. 2.2 11 km SE of Mayfield, Kansas
  6. 2.1 11 km SE of Mayfield, Kansas
  7. 2.6 11 km SW of Wellington, Kansas
  8. 1.6 11 km SE of Mayfield, Kansas
  9. 1.7 11 km SE of Mayfield, Kansas
  10. 2.8 11 km SE of Mayfield, Kansas
  11. 2.8 11 km SE of Mayfield, Kansas
  12. 2.2 11 km SE of Mayfield, Kansas
  13. 1.7 11 km SE of Mayfield, Kansas
  14. 2.3 11 km SE of Mayfield, Kansas
  15. 2.1 5 km W of Danville, 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.