QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

6 km NNW of Jefferson, Oklahoma

· 6.2 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 3 kmGarfield County 44 kmAlfalfa County 45 kmHarper County 51 kmSumner County 59 kmKay County 60 kmNoble County 68 kmMajor County 83 kmKingman 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 2.6 (ml)
Depth
6.2 km below the surface
Felt
no reports yet
Nearest
Grant County, 3 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3581 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 36.7775, -97.8179. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 3 km (2 mi) WSW of here earthquakes near Grant County
Garfield County, OK 44 km (28 mi) N of here earthquakes near Garfield County
Alfalfa County, OK 45 km (28 mi) E of here earthquakes near Alfalfa County
Harper County, KS 51 km (32 mi) SSE of here earthquakes near Harper County
Sumner County, KS 59 km (36 mi) SSW of here earthquakes near Sumner County
Kay County, OK 60 km (37 mi) W 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. 1.8 2 km E of Anthony, Kansas
  2. 2.5 8 km ESE of Wakita, Oklahoma
  3. 3.3 4 km NNE of Cherokee, Oklahoma
  4. 2.7 9 km SE of Wakita, Oklahoma
  5. 3.0 4 km NE of Meno, Oklahoma
  6. 2.6 3 km ESE of Byron, Oklahoma
  7. 2.7 8 km WNW of Deer Creek, Oklahoma
  8. 1.9 11 km WNW of Caldwell, Kansas
  9. 2.3 7 km WNW of Renfrow, Oklahoma
  10. 2.7 2 km NW of Deer Creek, Oklahoma
  11. 3.6 2 km NW of Deer Creek, Oklahoma
  12. 1.5 9 km WSW of Hunnewell, Kansas
  13. 2.0 12 km SSW of Milan, Kansas
  14. 2.7 8 km W of Hunnewell, Kansas
  15. 2.5 5 km S of Nash, 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.

On USGS

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