QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6mb_lg

4 km ENE of Douglas, Oklahoma

· 5.0 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garfield County 19 kmNoble County 37 kmLogan County 43 kmKingfisher County 45 kmGrant County 59 kmPayne County 62 kmKay County 74 kmAlfalfa County 81 kmOklahoma County 82 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 3.6 (mb_lg)
Depth
5.0 km below the surface
Felt
154 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Garfield County, 19 km NW
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. 154 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.9× 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 36.2715, -97.6240. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Garfield County, OK 19 km (12 mi) SE of here earthquakes near Garfield County
Noble County, OK 37 km (23 mi) WSW of here earthquakes near Noble County
Logan County, OK 43 km (27 mi) NNW of here earthquakes near Logan County
Kingfisher County, OK 45 km (28 mi) NE of here earthquakes near Kingfisher County
Grant County, OK 59 km (37 mi) SSE of here earthquakes near Grant County
Payne County, OK 62 km (39 mi) WNW of here earthquakes near Payne County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 1.8 4 km E of Enid, Oklahoma
  2. 1.8 4 km E of Enid, Oklahoma
  3. 2.1 8 km ENE of Guthrie, Oklahoma
  4. 1.6 2 km SSE of Meno, Oklahoma
  5. 1.6 2 km SW of Lucien, Oklahoma
  6. 1.9 4 km W of Lucien, Oklahoma
  7. 1.8 9 km WSW of Douglas, Oklahoma
  8. 1.9 0 km W of Douglas, Oklahoma
  9. 1.8 2 km SSE of Meno, Oklahoma
  10. 1.9 3 km SSE of Meno, Oklahoma
  11. 2.1 2 km SSE of Meno, Oklahoma
  12. 2.4 9 km ESE of Bison, Oklahoma
  13. 1.7 9 km ESE of Jefferson, Oklahoma
  14. 3.2 9 km ESE of Jefferson, Oklahoma
  15. 2.1 0 km NNW of Coyle, 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 4.6 on 2018-04-09 — it released about 32 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.