QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

4 km SSE of Braman, Oklahoma

· 7.4 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kay County 18 kmSumner County 42 kmGrant County 43 kmNoble County 56 kmCowley County 58 kmGarfield County 70 kmHarper County 74 kmPawnee County 85 kmOsage County 86 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
7.4 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Kay County, 18 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3677 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 36.8856, -97.3203. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kay County, OK 18 km (11 mi) WNW of here earthquakes near Kay County
Sumner County, KS 42 km (26 mi) SSE of here earthquakes near Sumner County
Grant County, OK 43 km (27 mi) ENE of here earthquakes near Grant County
Noble County, OK 56 km (35 mi) N of here earthquakes near Noble County
Cowley County, KS 58 km (36 mi) SW of here earthquakes near Cowley County
Garfield County, OK 70 km (44 mi) NE of here earthquakes near Garfield County

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

Aftershocks so far

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

  1. 2.2 5 km SSE of Bluff City, Kansas
  2. 2.7 5 km SSE of Bluff City, Kansas
  3. 2.1 5 km SSE of Bluff City, Kansas
  4. 2.4 5 km SSE of Bluff City, Kansas
  5. 3.1 6 km NNW of Red Rock, Oklahoma
  6. 2.9 6 km NNW of Red Rock, Oklahoma
  7. 1.8 2 km SE of Milan, Kansas
  8. 3.0 8 km WSW of Deer Creek, Oklahoma
  9. 3.5 9 km W of Deer Creek, Oklahoma
  10. 1.6 11 km ENE of Bluff City, Kansas
  11. 1.5 6 km ENE of Caldwell, Kansas
  12. 2.0 6 km ENE of Caldwell, Kansas
  13. 2.7 6 km ENE of Caldwell, Kansas
  14. 1.9 6 km ENE of Caldwell, Kansas
  15. 1.8 9 km SE of Bluff City, 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.