QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9mwr

6 km N of Wakita, Oklahoma

· 4.4 km deep · released about 11 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 20 kmHarper County 31 kmAlfalfa County 43 kmSumner County 50 kmGarfield County 63 kmKay County 70 kmKingman County 71 kmBarber County 76 kmNoble County 86 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 3.9 (mwr)
Depth
4.4 km below the surface
Felt
75 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Grant County, 20 km SE
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. 75 people have reported feeling it to USGS.

How big was it?

This earthquake released about 11 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 16,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 710× the energy of this one
  3. Magna, Utah 2020 M 5.7 500× the energy of this one
  4. This earthquake M 3.9 about 11 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 22× 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 36.9372, -97.9125. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 20 km (12 mi) NNW of here earthquakes near Grant County
Harper County, KS 31 km (19 mi) SSE of here earthquakes near Harper County
Alfalfa County, OK 43 km (27 mi) ENE of here earthquakes near Alfalfa County
Sumner County, KS 50 km (31 mi) SW of here earthquakes near Sumner County
Garfield County, OK 63 km (39 mi) N of here earthquakes near Garfield County
Kay County, OK 70 km (43 mi) WNW of here earthquakes near Kay 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. 2.0 1 km SE of Anthony, Kansas
  2. 3.8 9 km SSE of Byron, Oklahoma
  3. 1.9 1 km SW of Bluff City, Kansas
  4. 2.6 5 km E of Pond Creek, Oklahoma
  5. 2.7 5 km E of Pond Creek, Oklahoma
  6. 2.5 5 km SSE of Kremlin, Oklahoma
  7. 1.6 9 km WSW of Hunnewell, Kansas
  8. 2.7 10 km ESE of Jefferson, Oklahoma
  9. 3.1 5 km NNE of Wakita, Oklahoma
  10. 2.8 6 km N of Wakita, Oklahoma
  11. 2.9 6 km N of Wakita, Oklahoma
  12. 2.9 6 km N of Wakita, Oklahoma
  13. 2.4 4 km WSW of Harper, Kansas
  14. 2.5 6 km SW of Byron, Oklahoma
  15. 2.5 5 km NNE of Wakita, 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.