QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6mwr

10 km WSW of Shamrock, Oklahoma

· 7.1 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lincoln County 25 kmCreek County 28 kmPayne County 36 kmPawnee County 50 kmOkfuskee County 54 kmOkmulgee County 69 kmLogan County 70 kmTulsa County 73 kmOklahoma County 74 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 (mwr)
Depth
7.1 km below the surface
Felt
552 reports · strongest reported intensity VII
Measured shaking
intensity IV (ShakeMap)
Nearest
Lincoln County, 25 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2383 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 552 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 35.8610, -96.6822. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lincoln County, OK 25 km (16 mi) NE of here earthquakes near Lincoln County
Creek County, OK 28 km (17 mi) W of here earthquakes near Creek County
Payne County, OK 36 km (22 mi) SE of here earthquakes near Payne County
Pawnee County, OK 50 km (31 mi) S of here earthquakes near Pawnee County
Okfuskee County, OK 54 km (34 mi) NW of here earthquakes near Okfuskee County
Okmulgee County, OK 69 km (43 mi) WNW of here earthquakes near Okmulgee County

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

Aftershocks so far

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

  1. 2.9 10 km WSW of Shamrock, Oklahoma
  2. 2.5 4 km NE of Meridian, Oklahoma
  3. 2.7 10 km NNE of Kendrick, Oklahoma
  4. 2.5 3 km WNW of Cushing, Oklahoma
  5. 2.6 10 km WSW of Shamrock, Oklahoma
  6. 2.6 7 km W of Shamrock, Oklahoma
  7. 2.9 10 km WSW of Shamrock, Oklahoma
  8. 3.0 3 km WNW of Cushing, Oklahoma
  9. 2.5 9 km SW of Shamrock, Oklahoma
  10. 2.5 11 km WSW of Shamrock, Oklahoma
  11. 2.7 10 km WSW of Shamrock, Oklahoma
  12. 3.0 Oklahoma
  13. 3.3 2 km WNW of Cushing, Oklahoma
  14. 2.5 3 km ESE of Carney, Oklahoma
  15. 3.5 3 km SE of Carney, 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 5.0 on 2016-11-07 — it released about 130 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.