QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0mwr

17 km SSE of Waynoka, Oklahoma

· 7.1 km deep · released about 15 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Major County 26 kmWoods County 32 kmWoodward County 45 kmAlfalfa County 51 kmDewey County 57 kmBlaine County 71 kmBarber County 86 kmHarper County 88 kmGarfield 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 4.0 (mwr)
Depth
7.1 km below the surface
Felt
48 reports · strongest reported intensity III
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
Major County, 26 km SE
Status
Reviewed by a seismologist

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

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 48 people have reported feeling it to USGS.

How big was it?

This earthquake released about 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 11,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 500× the energy of this one
  3. Magna, Utah 2020 M 5.7 350× the energy of this one
  4. This earthquake M 4.0 about 15 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 32× 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 36.4493, -98.7758. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Major County, OK 26 km (16 mi) NW of here earthquakes near Major County
Woods County, OK 32 km (20 mi) SSE of here earthquakes near Woods County
Woodward County, OK 45 km (28 mi) E of here earthquakes near Woodward County
Alfalfa County, OK 51 km (32 mi) SW of here earthquakes near Alfalfa County
Dewey County, OK 57 km (35 mi) NNE of here earthquakes near Dewey County
Blaine County, OK 71 km (44 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

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

  1. 2.6 4 km SW of Cherokee, Oklahoma
  2. 2.5 17 km SSE of Waynoka, Oklahoma
  3. 2.5 17 km SE of Waynoka, Oklahoma
  4. 2.5 17 km SSE of Waynoka, Oklahoma
  5. 2.5 17 km SSE of Waynoka, Oklahoma
  6. 2.9 17 km SSE of Waynoka, Oklahoma
  7. 2.8 17 km SSE of Waynoka, Oklahoma
  8. 2.7 17 km SSE of Waynoka, Oklahoma
  9. 2.8 8 km WSW of Waynoka, Oklahoma
  10. 2.9 17 km SE of Waynoka, Oklahoma
  11. 2.6 9 km WSW of Waynoka, Oklahoma
  12. 2.5 12 km WSW of Cleo Springs, Oklahoma
  13. 2.7 16 km SE of Waynoka, Oklahoma
  14. 2.7 5 km N of Lambert, Oklahoma
  15. 2.6 16 km SSE 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 5.1 on 2016-02-13 — it released about 45 times the energy of this one.

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

On USGS

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