QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

2 km SSE of Milan, Kansas

· 4.3 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 15 kmHarper County 37 kmGrant County 52 kmSedgwick County 52 kmKingman County 55 kmKay County 66 kmCowley County 73 kmAlfalfa County 82 kmReno 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 1.7 (ml)
Depth
4.3 km below the surface
Felt
no reports yet
Nearest
Sumner County, 15 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3591 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 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 37.2418, -97.6590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 15 km (9 mi) W of here earthquakes near Sumner County
Harper County, KS 37 km (23 mi) E of here earthquakes near Harper County
Grant County, OK 52 km (32 mi) NNE of here earthquakes near Grant County
Sedgwick County, KS 52 km (32 mi) SSW of here earthquakes near Sedgwick County
Kingman County, KS 55 km (34 mi) SE of here earthquakes near Kingman County
Kay County, OK 66 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

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

  1. 1.8 3 km N of Freeport, Kansas
  2. 1.9 7 km SE of Bluff City, Kansas
  3. 2.0 6 km WSW of Bluff City, Kansas
  4. 2.7 8 km NNE of Nardin, Oklahoma
  5. 2.0 7 km NNE of Caldwell, Kansas
  6. 1.9 5 km SSE of Freeport, Kansas
  7. 1.7 5 km ESE of Freeport, Kansas
  8. 2.1 4 km ESE of Caldwell, Kansas
  9. 2.5 9 km SW of Conway Springs, Kansas
  10. 1.9 6 km WNW of Hunnewell, Kansas
  11. 1.5 2 km E of Anthony, Kansas
  12. 2.1 6 km ESE of Freeport, Kansas
  13. 1.5 11 km W of Caldwell, Kansas
  14. 3.0 6 km E of Renfrow, Oklahoma
  15. 1.8 6 km S of Harper, 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 2,900 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.