QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3mb_lg

9 km SSE of Milan, Kansas

· 9.9 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 13 kmHarper County 39 kmGrant County 46 kmSedgwick County 57 kmKay County 59 kmKingman County 62 kmCowley County 70 kmAlfalfa County 80 kmGarfield County 91 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 2.3 (mb_lg)
Depth
9.9 km below the surface
Felt
no reports yet
Nearest
Sumner County, 13 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2656 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 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 37.1837, -97.6239. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 13 km (8 mi) WSW of here earthquakes near Sumner County
Harper County, KS 39 km (24 mi) E of here earthquakes near Harper County
Grant County, OK 46 km (29 mi) NNE of here earthquakes near Grant County
Sedgwick County, KS 57 km (36 mi) SSW of here earthquakes near Sedgwick County
Kay County, OK 59 km (37 mi) NW of here earthquakes near Kay County
Kingman County, KS 62 km (38 mi) SE of here earthquakes near Kingman County

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

Aftershocks so far

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

  1. 2.0 11 km ENE of Wakita, Oklahoma
  2. 2.0 11 km ENE of Wakita, Oklahoma
  3. 1.7 4 km W of Freeport, Kansas
  4. 2.0 9 km WSW of Hunnewell, Kansas
  5. 2.5 4 km NE of South Haven, Kansas
  6. 2.2 9 km WNW of Viola, Kansas
  7. 1.6 7 km N of Nardin, Oklahoma
  8. 2.2 7 km N of Nardin, Oklahoma
  9. 2.1 8 km N of Nardin, Oklahoma
  10. 2.9 8 km NNE of Nardin, Oklahoma
  11. 1.6 7 km N of Nardin, Oklahoma
  12. 1.9 8 km NNE of Nardin, Oklahoma
  13. 2.8 7 km N of Nardin, Oklahoma
  14. 2.7 7 km N of Nardin, Oklahoma
  15. 2.2 8 km N of Nardin, Oklahoma

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 4.1 on 2017-03-29 — it released about 500 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.