QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

5 km SE of Freeport, Kansas

· 4.3 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 22 kmSumner County 30 kmGrant County 42 kmKingman County 52 kmAlfalfa County 66 kmSedgwick County 66 kmKay County 71 kmBarber County 77 kmGarfield 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 2.4 (ml)
Depth
4.3 km below the surface
Felt
no reports yet
Nearest
Harper County, 22 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3399 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 37.1610, -97.8177. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 22 km (14 mi) E of here earthquakes near Harper County
Sumner County, KS 30 km (19 mi) WSW of here earthquakes near Sumner County
Grant County, OK 42 km (26 mi) N of here earthquakes near Grant County
Kingman County, KS 52 km (32 mi) SSE of here earthquakes near Kingman County
Alfalfa County, OK 66 km (41 mi) NE of here earthquakes near Alfalfa County
Sedgwick County, KS 66 km (41 mi) SSW of here earthquakes near Sedgwick County

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

Aftershocks so far

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

  1. 1.6 6 km ESE of Mayfield, Kansas
  2. 2.5 5 km WNW of Medford, Oklahoma
  3. 2.4 7 km ESE of Mayfield, Kansas
  4. 2.1 7 km ESE of Mayfield, Kansas
  5. 1.6 11 km NNW of Caldwell, Kansas
  6. 2.7 8 km W of Belle Plaine, Kansas
  7. 2.7 9 km W of Bluff City, Kansas
  8. 2.5 9 km W of Bluff City, Kansas
  9. 1.6 5 km SSE of Freeport, Kansas
  10. 1.5 2 km NE of Caldwell, Kansas
  11. 2.5 2 km SW of Waldron, Kansas
  12. 2.9 3 km NNW of Freeport, Kansas
  13. 1.8 3 km NNW of Freeport, Kansas
  14. 2.0 7 km ESE of Mayfield, Kansas
  15. 2.0 11 km NNW of Caldwell, 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 250 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.