QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

4 km NNW of Bluff City, Kansas

· 5.6 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 17 kmGrant County 38 kmSumner County 39 kmKingman County 53 kmAlfalfa County 57 kmBarber County 71 kmSedgwick County 74 kmKay County 75 kmGarfield County 82 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 2.6 (ml)
Depth
5.6 km below the surface
Felt
no reports yet
Nearest
Harper County, 17 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3183 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 37.1140, -97.9003. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 17 km (10 mi) ESE of here earthquakes near Harper County
Grant County, OK 38 km (23 mi) NNW of here earthquakes near Grant County
Sumner County, KS 39 km (24 mi) WSW of here earthquakes near Sumner County
Kingman County, KS 53 km (33 mi) SSE of here earthquakes near Kingman County
Alfalfa County, OK 57 km (35 mi) NE of here earthquakes near Alfalfa County
Barber County, KS 71 km (44 mi) E of here earthquakes near Barber 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. 1.9 3 km E of Freeport, Kansas
  2. 1.6 7 km E of Manchester, Oklahoma
  3. 1.7 4 km SW of Mayfield, Kansas
  4. 2.8 5 km E of Nescatunga, Oklahoma
  5. 1.6 2 km E of Freeport, Kansas
  6. 1.8 6 km SSW of Freeport, Kansas
  7. 2.5 6 km E of Nescatunga, Oklahoma
  8. 2.5 8 km N of Nardin, Oklahoma
  9. 3.3 7 km N of Nardin, Oklahoma
  10. 1.7 1 km NNW of Milan, Kansas
  11. 2.5 8 km NE of Hazelton, Kansas
  12. 1.5 6 km ESE of Freeport, Kansas
  13. 2.6 3 km WNW of Byron, Oklahoma
  14. 2.3 6 km NW of Renfrow, Oklahoma
  15. 1.9 3 km E 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2017-09-08 — it released about 350 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.