QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9mb_lg

4 km E of Milton, Kansas

· 5.0 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 30 kmSedgwick County 36 kmKingman County 39 kmHarper County 41 kmReno County 65 kmGrant County 72 kmHarvey County 73 kmCowley County 81 kmKay County 86 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 2.9 (mb_lg)
Depth
5.0 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Sumner County, 30 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3524 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 37.4336, -97.7234. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 30 km (19 mi) NW of here earthquakes near Sumner County
Sedgwick County, KS 36 km (22 mi) SW of here earthquakes near Sedgwick County
Kingman County, KS 39 km (25 mi) ESE of here earthquakes near Kingman County
Harper County, KS 41 km (25 mi) NE of here earthquakes near Harper County
Reno County, KS 65 km (41 mi) SSE of here earthquakes near Reno County
Grant County, OK 72 km (45 mi) N of here earthquakes near Grant County

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

Aftershocks so far

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

  1. 2.5 6 km WSW of Bluff City, Kansas
  2. 2.2 8 km ENE of Bluff City, Kansas
  3. 1.6 Kansas
  4. 1.8 9 km W of Bluff City, Kansas
  5. 1.8 5 km ESE of Freeport, Kansas
  6. 1.9 3 km SSE of Danville, Kansas
  7. 1.5 7 km S of Anthony, Kansas
  8. 1.6 7 km S of Anthony, Kansas
  9. 2.0 3 km NNW of Freeport, Kansas
  10. 2.1 4 km NE of Bluff City, Kansas
  11. 2.5 8 km SSW of Cheney, Kansas
  12. 2.4 8 km SSW of Cheney, Kansas
  13. 1.6 4 km NNE of Anthony, Kansas
  14. 1.6 1 km E of Danville, Kansas
  15. 1.6 3 km NNW of Freeport, 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.