QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

7 km S of Manchester, Oklahoma

· 5.6 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 26 kmHarper County 29 kmAlfalfa County 35 kmSumner County 58 kmGarfield County 65 kmBarber County 67 kmKingman County 70 kmWoods County 78 kmKay County 80 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 2.9 (ml)
Depth
5.6 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Grant County, 26 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1517 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 36.9304, -98.0265. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 26 km (16 mi) NW of here earthquakes near Grant County
Harper County, KS 29 km (18 mi) S of here earthquakes near Harper County
Alfalfa County, OK 35 km (21 mi) NE of here earthquakes near Alfalfa County
Sumner County, KS 58 km (36 mi) SW of here earthquakes near Sumner County
Garfield County, OK 65 km (40 mi) NNW of here earthquakes near Garfield County
Barber County, KS 67 km (42 mi) ESE of here earthquakes near Barber County

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

Aftershocks so far

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

  1. 2.6 5 km E of Pond Creek, Oklahoma
  2. 1.7 3 km E of Bluff City, Kansas
  3. 2.5 7 km E of Nescatunga, Oklahoma
  4. 2.1 6 km SSE of Harper, Kansas
  5. 3.1 5 km E of Pond Creek, Oklahoma
  6. 1.9 7 km NE of Anthony, Kansas
  7. 1.5 Kansas
  8. 1.9 8 km ENE of Caldwell, Kansas
  9. 1.6 8 km ENE of Caldwell, Kansas
  10. 1.9 8 km ENE of Caldwell, Kansas
  11. 1.9 5 km SE of Freeport, Kansas
  12. 1.5 4 km ESE of Manchester, Oklahoma
  13. 1.7 6 km SSE of Anthony, Kansas
  14. 2.6 8 km WNW of Medford, Oklahoma
  15. 2.5 12 km WNW 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.

On USGS

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