QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

7 km NE of Nash, Oklahoma

· 6.2 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 20 kmAlfalfa County 31 kmGarfield County 40 kmHarper County 54 kmMajor County 66 kmSumner County 73 kmNoble County 75 kmKay County 76 kmWoods County 79 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 2.5 (ml)
Depth
6.2 km below the surface
Felt
no reports yet
Nearest
Grant County, 20 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3824 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 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 36.7039, -97.9815. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 20 km (12 mi) WSW of here earthquakes near Grant County
Alfalfa County, OK 31 km (19 mi) E of here earthquakes near Alfalfa County
Garfield County, OK 40 km (25 mi) NNW of here earthquakes near Garfield County
Harper County, KS 54 km (34 mi) S of here earthquakes near Harper County
Major County, OK 66 km (41 mi) NE of here earthquakes near Major County
Sumner County, KS 73 km (46 mi) SW of here earthquakes near Sumner 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. 2.1 11 km WNW of Caldwell, Kansas
  2. 3.4 4 km WNW of Medford, Oklahoma
  3. 1.9 5 km WSW of Bluff City, Kansas
  4. 2.6 3 km NNE of Kremlin, Oklahoma
  5. 3.5 2 km NNE of Kremlin, Oklahoma
  6. 3.1 2 km NNE of Kremlin, Oklahoma
  7. 1.6 6 km S of Anthony, Kansas
  8. 1.8 6 km S of Anthony, Kansas
  9. 1.8 6 km S of Anthony, Kansas
  10. 1.6 6 km S of Anthony, Kansas
  11. 1.6 Kansas
  12. 2.0 6 km S of Anthony, Kansas
  13. 1.7 6 km S of Anthony, Kansas
  14. 1.6 6 km S of Anthony, Kansas
  15. 2.6 6 km S of Anthony, 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.

On USGS

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