QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

5 km E of Velma, Oklahoma

· 15 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Stephens County 23 kmCarter County 38 kmGarvin County 39 kmJefferson County 45 kmMurray County 49 kmMcClain County 63 kmLove County 66 kmGrady County 67 kmCotton County 73 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 1.8 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Stephens County, 23 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1574 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 34.4650, -97.6108. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Stephens County, OK 23 km (14 mi) E of here earthquakes near Stephens County
Carter County, OK 38 km (24 mi) NW of here earthquakes near Carter County
Garvin County, OK 39 km (24 mi) SW of here earthquakes near Garvin County
Jefferson County, OK 45 km (28 mi) NNE of here earthquakes near Jefferson County
Murray County, OK 49 km (31 mi) W of here earthquakes near Murray County
McClain County, OK 63 km (39 mi) SSW of here earthquakes near McClain County

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

Aftershocks so far

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

  1. 1.6 7 km N of Velma, Oklahoma
  2. 1.8 7 km N of Velma, Oklahoma
  3. 1.8 6 km N of Velma, Oklahoma
  4. 2.1 5 km N of Velma, Oklahoma
  5. 2.1 5 km N of Velma, Oklahoma
  6. 1.6 10 km W of Davis, Oklahoma
  7. 1.9 12 km SE of Katie, Oklahoma
  8. 1.8 3 km SSW of Ratliff City, Oklahoma
  9. 1.7 9 km W of Davis, Oklahoma
  10. 1.8 10 km W of Davis, Oklahoma
  11. 1.6 9 km WNW of Davis, Oklahoma
  12. 2.0 11 km SE of Katie, Oklahoma
  13. 1.8 8 km SSE of Katie, Oklahoma
  14. 2.0 9 km W of Davis, Oklahoma
  15. 1.7 2 km SSE of Erin Springs, 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

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