QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

9 km WNW of Velma, Oklahoma

· 7.0 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Stephens County 8 kmJefferson County 44 kmGarvin County 48 kmCarter County 52 kmGrady County 59 kmCotton County 60 kmMurray County 64 kmMcClain County 65 kmComanche County 67 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 1.6 (ml)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
Stephens County, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 979 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 34.4947, -97.7702. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Stephens County, OK 8 km (5 mi) E of here earthquakes near Stephens County
Jefferson County, OK 44 km (27 mi) N of here earthquakes near Jefferson County
Garvin County, OK 48 km (30 mi) WSW of here earthquakes near Garvin County
Carter County, OK 52 km (32 mi) WNW of here earthquakes near Carter County
Grady County, OK 59 km (37 mi) S of here earthquakes near Grady County
Cotton County, OK 60 km (37 mi) ENE of here earthquakes near Cotton County

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

Aftershocks so far

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

  1. 1.8 13 km SW of Bradley, Oklahoma
  2. 1.8 13 km E of Rush Springs, Oklahoma
  3. 1.6 13 km SW of Bradley, Oklahoma
  4. 1.7 7 km WSW of Ratliff City, Oklahoma
  5. 1.9 7 km WSW of Ratliff City, Oklahoma
  6. 1.9 7 km WSW of Ratliff City, Oklahoma
  7. 2.1 6 km WSW of Ratliff City, Oklahoma
  8. 1.8 8 km SW of Ratliff City, Oklahoma
  9. 1.5 7 km WSW of Ratliff City, Oklahoma
  10. 1.9 8 km SW of Ratliff City, Oklahoma
  11. 1.6 12 km SE of Katie, Oklahoma
  12. 1.7 8 km SSE of Erin Springs, Oklahoma
  13. 1.5 5 km ENE of Alex, Oklahoma
  14. 2.8 7 km WNW of Healdton, Oklahoma
  15. 2.2 7 km WNW of Healdton, 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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