QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

4 km NW of Braman, Oklahoma

· 8.1 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kay County 25 kmSumner County 33 kmGrant County 42 kmCowley County 56 kmNoble County 65 kmHarper County 68 kmGarfield County 75 kmSedgwick County 81 kmAlfalfa County 89 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
8.1 km below the surface
Felt
no reports yet
Nearest
Kay County, 25 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3082 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 36.9562, -97.3624. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kay County, OK 25 km (16 mi) NW of here earthquakes near Kay County
Sumner County, KS 33 km (21 mi) SSE of here earthquakes near Sumner County
Grant County, OK 42 km (26 mi) ENE of here earthquakes near Grant County
Cowley County, KS 56 km (35 mi) WSW of here earthquakes near Cowley County
Noble County, OK 65 km (40 mi) N of here earthquakes near Noble County
Harper County, KS 68 km (42 mi) ESE of here earthquakes near Harper County

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

Aftershocks so far

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

  1. 1.7 6 km NW of Renfrow, Oklahoma
  2. 2.9 4 km WNW of Medford, Oklahoma
  3. 1.7 7 km S of Argonia, Kansas
  4. 2.5 Kansas
  5. 3.5 7 km E of Freeport, Kansas
  6. 2.7 1 km ENE of Bluff City, Kansas
  7. 1.6 7 km ESE of Freeport, Kansas
  8. 2.6 1 km SE of Renfrow, Oklahoma
  9. 2.6 7 km NNW of Lamont, Oklahoma
  10. 2.4 6 km NNE of Wakita, Oklahoma
  11. 2.2 8 km WSW of Hunnewell, Kansas
  12. 3.0 5 km NE of Medford, Oklahoma
  13. 2.0 9 km WSW of Hunnewell, Kansas
  14. 3.2 7 km W of Hunnewell, Kansas
  15. 2.2 8 km W of Hunnewell, 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.