QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1mb_lg

7 km SSE of Milton, Kansas

· 2.0 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 26 kmHarper County 36 kmKingman County 41 kmSedgwick County 42 kmGrant County 65 kmReno County 71 kmHarvey County 80 kmCowley County 81 kmKay County 81 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 3.1 (mb_lg)
Depth
2.0 km below the surface
Felt
34 reports · strongest reported intensity IV
Nearest
Sumner County, 26 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2382 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 34 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 37.3738, -97.7350. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 26 km (16 mi) NW of here earthquakes near Sumner County
Harper County, KS 36 km (22 mi) NE of here earthquakes near Harper County
Kingman County, KS 41 km (26 mi) ESE of here earthquakes near Kingman County
Sedgwick County, KS 42 km (26 mi) SW of here earthquakes near Sedgwick County
Grant County, OK 65 km (41 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. 1.9 3 km SSE of Danville, Kansas
  2. 1.5 7 km S of Anthony, Kansas
  3. 1.6 7 km S of Anthony, Kansas
  4. 2.0 8 km N of Manchester, Oklahoma
  5. 2.0 3 km NNW of Freeport, Kansas
  6. 2.1 4 km NE of Bluff City, Kansas
  7. 2.5 8 km SSW of Cheney, Kansas
  8. 2.4 8 km SSW of Cheney, Kansas
  9. 1.6 4 km NNE of Anthony, Kansas
  10. 1.6 8 km NNW of Manchester, Oklahoma
  11. 2.7 3 km N of Renfrow, Oklahoma
  12. 1.6 1 km E of Danville, Kansas
  13. 1.6 3 km NNW of Freeport, Kansas
  14. 1.5 5 km NE of Caldwell, Kansas
  15. 1.7 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.