QuakeIndex

Earthquake · reviewed by a seismologist

M 5.1mww

18 km SE of Waynoka, Oklahoma

· 8.3 km deep · released about 670 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Major County 25 kmWoods County 30 kmAlfalfa County 44 kmWoodward County 51 kmDewey County 63 kmBlaine County 73 kmBarber County 82 kmGarfield County 83 kmGrant County 89 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 5.1 (mww)
Depth
8.3 km below the surface
Felt
4049 reports · strongest reported intensity VII
Measured shaking
intensity VII (ShakeMap)
USGS impact alert
green
Nearest
Major County, 25 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1608 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 4049 people have reported feeling it to USGS.

How big was it?

This earthquake released about 670 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11× the energy of this one
  3. Magna, Utah 2020 M 5.7 7.9× the energy of this one
  4. This earthquake M 5.1 about 670 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 1,400× 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 36.4898, -98.7090. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Major County, OK 25 km (15 mi) NW of here earthquakes near Major County
Woods County, OK 30 km (18 mi) SSE of here earthquakes near Woods County
Alfalfa County, OK 44 km (27 mi) SW of here earthquakes near Alfalfa County
Woodward County, OK 51 km (32 mi) E of here earthquakes near Woodward County
Dewey County, OK 63 km (39 mi) NNE of here earthquakes near Dewey County
Blaine County, OK 73 km (45 mi) NNW of here earthquakes near Blaine 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. 2.7 22 km SE of Waynoka, Oklahoma
  2. 1.9 22 km W of Cleo Springs, Oklahoma
  3. 2.9 Oklahoma
  4. 2.9 14 km W of Aline, Oklahoma
  5. 2.0 17 km SE of Waynoka, Oklahoma
  6. 2.3 17 km SE of Waynoka, Oklahoma
  7. 2.6 16 km SE of Waynoka, Oklahoma
  8. 2.7 16 km SE of Waynoka, Oklahoma
  9. 3.1 17 km SE of Waynoka, Oklahoma
  10. 3.0 16 km SE of Waynoka, Oklahoma
  11. 2.6 17 km SE of Waynoka, Oklahoma
  12. 1.7 17 km SSE of Waynoka, Oklahoma
  13. 1.7 17 km SE of Waynoka, Oklahoma
  14. 1.6 Oklahoma
  15. 3.1 15 km SE of Waynoka, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.7 on 2016-01-07.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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