QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

5 km ESE of Tonkawa, Oklahoma

· 4.1 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kay County 20 kmNoble County 31 kmGrant County 49 kmGarfield County 57 kmPawnee County 63 kmSumner County 67 kmPayne County 70 kmCowley County 74 kmOsage County 76 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 3.1 (ml)
Depth
4.1 km below the surface
Felt
4 reports · strongest reported intensity IV
Nearest
Kay County, 20 km NNE
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. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 36.6629, -97.2568. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kay County, OK 20 km (12 mi) SSW of here earthquakes near Kay County
Noble County, OK 31 km (19 mi) N of here earthquakes near Noble County
Grant County, OK 49 km (31 mi) ESE of here earthquakes near Grant County
Garfield County, OK 57 km (35 mi) NE of here earthquakes near Garfield County
Pawnee County, OK 63 km (39 mi) NW of here earthquakes near Pawnee County
Sumner County, KS 67 km (42 mi) SSE of here earthquakes near Sumner County

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

Aftershocks so far

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

  1. 2.6 1 km WSW of Braman, Oklahoma
  2. 2.6 7 km NW of Marland, Oklahoma
  3. 3.0 8 km ESE of Pond Creek, Oklahoma
  4. 2.1 4 km ENE of Caldwell, Kansas
  5. 2.8 8 km ESE of Pond Creek, Oklahoma
  6. 2.1 7 km S of Perry, Oklahoma
  7. 2.8 4 km SSW of Renfrow, Oklahoma
  8. 2.8 9 km W of Lamont, Oklahoma
  9. 2.6 7 km NNW of Hunter, Oklahoma
  10. 3.5 1 km W of Braman, Oklahoma
  11. 3.3 7 km NNW of Hunter, Oklahoma
  12. 3.5 5 km W of Lucien, Oklahoma
  13. 3.4 3 km SSW of Renfrow, Oklahoma
  14. 2.6 4 km S of Braman, Oklahoma
  15. 3.1 10 km ENE of Perry, 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

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