QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6mb_lg

12 km SSE of Waynoka, Oklahoma

· 13 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Woods County 28 kmMajor County 31 kmWoodward County 40 kmAlfalfa County 53 kmDewey County 58 kmBlaine County 75 kmHarper County 83 kmBarber County 84 kmEllis 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 2.6 (mb_lg)
Depth
13 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Woods County, 28 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3455 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 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 36.4745, -98.8280. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Woods County, OK 28 km (18 mi) S of here earthquakes near Woods County
Major County, OK 31 km (19 mi) NW of here earthquakes near Major County
Woodward County, OK 40 km (25 mi) E of here earthquakes near Woodward County
Alfalfa County, OK 53 km (33 mi) WSW of here earthquakes near Alfalfa County
Dewey County, OK 58 km (36 mi) NNE of here earthquakes near Dewey County
Blaine County, OK 75 km (47 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. 3.2 9 km SW of Waynoka, Oklahoma
  2. 2.6 15 km WNW of Alva, Oklahoma
  3. 2.5 10 km NE of Quinlan, Oklahoma
  4. 2.9 4 km WNW of Ringwood, Oklahoma
  5. 2.7 2 km NNW of Lambert, Oklahoma
  6. 2.6 2 km NNW of Lambert, Oklahoma
  7. 2.7 10 km SW of Waynoka, Oklahoma
  8. 2.7 15 km WNW of Canton, Oklahoma
  9. 3.0 15 km WNW of Canton, Oklahoma
  10. 2.5 13 km SSE of Freedom, Oklahoma
  11. 2.9 17 km SE of Waynoka, Oklahoma
  12. 2.9 2 km NNW of Lambert, Oklahoma
  13. 2.5 16 km SSE of Waynoka, Oklahoma
  14. 2.7 14 km WNW of Canton, Oklahoma
  15. 2.8 13 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 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.