QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

10 km NE of Thomas, Oklahoma

· 20 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blaine County 22 kmCuster County 36 kmDewey County 36 kmMajor County 56 kmWashita County 66 kmKingfisher County 67 kmCanadian County 69 kmCaddo County 76 kmWoodward County 87 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 1.5 (ml)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Blaine County, 22 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 618 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 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 35.8148, -98.6633. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blaine County, OK 22 km (14 mi) WSW of here earthquakes near Blaine County
Custer County, OK 36 km (22 mi) ENE of here earthquakes near Custer County
Dewey County, OK 36 km (23 mi) ESE of here earthquakes near Dewey County
Major County, OK 56 km (35 mi) S of here earthquakes near Major County
Washita County, OK 66 km (41 mi) NNE of here earthquakes near Washita County
Kingfisher County, OK 67 km (42 mi) WSW of here earthquakes near Kingfisher County

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

Aftershocks so far

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

  1. 1.6 1 km NE of Watonga, Oklahoma
  2. 1.6 2 km NNE of Watonga, Oklahoma
  3. 1.7 15 km SSW of Loyal, Oklahoma
  4. 1.7 9 km W of Loyal, Oklahoma
  5. 1.6 10 km W of Loyal, Oklahoma
  6. 2.5 9 km W of Loyal, Oklahoma
  7. 2.3 10 km W of Loyal, Oklahoma
  8. 1.5 10 km E of Hitchcock, Oklahoma
  9. 1.5 9 km W of Loyal, Oklahoma
  10. 1.5 9 km W of Loyal, Oklahoma
  11. 1.7 9 km W of Loyal, Oklahoma
  12. 1.5 9 km W of Loyal, Oklahoma
  13. 1.8 9 km W of Loyal, Oklahoma
  14. 2.6 9 km W of Loyal, Oklahoma
  15. 2.1 9 km W of Loyal, 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.