QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

17 km SE of Waynoka, Oklahoma

· 7.9 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Major County 26 kmWoods County 31 kmWoodward County 45 kmAlfalfa County 50 kmDewey County 57 kmBlaine County 71 kmBarber County 86 kmHarper County 88 kmGarfield County 88 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 2.6 (ml)
Depth
7.9 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Major County, 26 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1512 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 36.4538, -98.7723. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Major County, OK 26 km (16 mi) NW of here earthquakes near Major County
Woods County, OK 31 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 50 km (31 mi) SW of here earthquakes near Alfalfa County
Dewey County, OK 57 km (36 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

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

  1. 2.5 13 km SSE of Waynoka, Oklahoma
  2. 2.8 14 km SSE of Waynoka, Oklahoma
  3. 2.6 14 km WNW of Longdale, Oklahoma
  4. 2.8 13 km NW of Longdale, Oklahoma
  5. 2.6 17 km SE of Waynoka, Oklahoma
  6. 2.6 14 km WNW of Longdale, Oklahoma
  7. 2.7 17 km SSE of Waynoka, Oklahoma
  8. 2.7 17 km W of Aline, Oklahoma
  9. 2.8 7 km N of Mooreland, Oklahoma
  10. 2.5 16 km SSE of Waynoka, Oklahoma
  11. 2.4 7 km NW of Okeene, Oklahoma
  12. 2.4 7 km NW of Okeene, Oklahoma
  13. 3.4 7 km NW of Okeene, Oklahoma
  14. 2.4 8 km NNE of Mooreland, Oklahoma
  15. 2.9 9 km WSW 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 5,600 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.