QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

5 km ENE of Milan, Kansas

· 4.9 km deep · released about 64 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 12 kmHarper County 41 kmSedgwick County 47 kmKingman County 56 kmGrant County 56 kmKay County 67 kmCowley County 70 kmReno County 85 kmAlfalfa County 87 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 2.2 (ml)
Depth
4.9 km below the surface
Felt
no reports yet
Nearest
Sumner County, 12 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3406 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 64 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 64 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 37.2767, -97.6208. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 12 km (8 mi) WNW of here earthquakes near Sumner County
Harper County, KS 41 km (25 mi) ENE of here earthquakes near Harper County
Sedgwick County, KS 47 km (29 mi) SSW of here earthquakes near Sedgwick County
Kingman County, KS 56 km (35 mi) ESE of here earthquakes near Kingman County
Grant County, OK 56 km (35 mi) NNE of here earthquakes near Grant County
Kay County, OK 67 km (41 mi) NW of here earthquakes near Kay County

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

Aftershocks so far

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

  1. 1.7 3 km SSE of Danville, Kansas
  2. 1.6 9 km W of Bluff City, Kansas
  3. 2.3 Kansas
  4. 1.9 9 km W of Bluff City, Kansas
  5. 2.5 3 km SSE of Danville, Kansas
  6. 1.9 7 km SSW of Anthony, Kansas
  7. 2.0 6 km SSE of Argonia, Kansas
  8. 2.2 7 km SE of Harper, Kansas
  9. 1.6 7 km SE of Harper, Kansas
  10. 3.5 7 km SE of Harper, Kansas
  11. 2.0 4 km NNW of Bluff City, Kansas
  12. 2.4 9 km WSW of Harper, Kansas
  13. 1.8 8 km SE of Harper, Kansas
  14. 2.1 6 km SE of Harper, Kansas
  15. 2.6 6 km SSW of Cheney, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2016-11-25 — it released about 470 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.