QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5mb_lg

15 km WSW of Watonga, Oklahoma

· 8.5 km deep · released about 2.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blaine County 16 kmCuster County 42 kmDewey County 46 kmMajor County 59 kmCanadian County 59 kmKingfisher County 60 kmWashita County 67 kmCaddo County 71 kmWoodward County 95 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 3.5 (mb_lg)
Depth
8.5 km below the surface
Felt
21 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Blaine County, 16 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2382 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 21 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× 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 35.7871, -98.5660. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blaine County, OK 16 km (10 mi) SW of here earthquakes near Blaine County
Custer County, OK 42 km (26 mi) ENE of here earthquakes near Custer County
Dewey County, OK 46 km (28 mi) ESE of here earthquakes near Dewey County
Major County, OK 59 km (36 mi) S of here earthquakes near Major County
Canadian County, OK 59 km (37 mi) WNW of here earthquakes near Canadian County
Kingfisher County, OK 60 km (37 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

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

  1. 2.5 13 km NW of Longdale, Oklahoma
  2. 2.8 14 km WNW of Longdale, Oklahoma
  3. 3.1 16 km ENE of Thomas, Oklahoma
  4. 2.2 8 km ENE of Greenfield, Oklahoma
  5. 3.2 15 km WSW of Watonga, Oklahoma
  6. 2.8 4 km SSW of Thomas, Oklahoma
  7. 2.3 14 km ENE of Thomas, Oklahoma
  8. 2.9 14 km WNW of Longdale, Oklahoma
  9. 2.6 14 km WNW of Longdale, Oklahoma
  10. 2.8 13 km NW of Longdale, Oklahoma
  11. 2.6 14 km WNW of Longdale, Oklahoma
  12. 2.6 4 km NNE of Okeene, Oklahoma
  13. 2.4 7 km NW of Okeene, Oklahoma
  14. 2.4 7 km NW of Okeene, Oklahoma
  15. 3.4 7 km NW of Okeene, 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.