QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2mwr

9 km NW of Perry, Oklahoma

· 7.8 km deep · released about 30 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Noble County 11 kmGarfield County 39 kmPayne County 46 kmLogan County 50 kmKay County 54 kmPawnee County 60 kmGrant County 61 kmKingfisher County 69 kmLincoln County 85 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 4.2 (mwr)
Depth
7.8 km below the surface
Felt
1768 reports · strongest reported intensity VI
Measured shaking
intensity VI (ShakeMap)
Nearest
Noble County, 11 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2219 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 1768 people have reported feeling it to USGS.

How big was it?

This earthquake released about 30 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 5,600× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 250× the energy of this one
  3. Magna, Utah 2020 M 5.7 180× the energy of this one
  4. This earthquake M 4.2 about 30 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 63× 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 36.3588, -97.3588. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Noble County, OK 11 km (7 mi) WSW of here earthquakes near Noble County
Garfield County, OK 39 km (24 mi) E of here earthquakes near Garfield County
Payne County, OK 46 km (29 mi) NW of here earthquakes near Payne County
Logan County, OK 50 km (31 mi) N of here earthquakes near Logan County
Kay County, OK 54 km (34 mi) SSW of here earthquakes near Kay County
Pawnee County, OK 60 km (37 mi) W of here earthquakes near Pawnee County

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

Aftershocks so far

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

  1. 2.3 10 km NW of Perry, Oklahoma
  2. 1.7 9 km NW of Perry, Oklahoma
  3. 1.6 5 km SW of Glencoe, Oklahoma
  4. 1.5 10 km NW of Perry, Oklahoma
  5. 1.7 3 km ENE of Douglas, Oklahoma
  6. 1.6 10 km NW of Perry, Oklahoma
  7. 1.6 9 km NW of Perry, Oklahoma
  8. 2.0 10 km NW of Perry, Oklahoma
  9. 1.5 9 km NW of Perry, Oklahoma
  10. 1.7 12 km E of Red Rock, Oklahoma
  11. 1.6 6 km NNE of Morrison, Oklahoma
  12. 1.6 8 km E of Orlando, Oklahoma
  13. 2.3 9 km NW of Perry, Oklahoma
  14. 1.6 9 km NW of Perry, Oklahoma
  15. 1.6 9 km W of Lamont, 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 5.8 on 2016-09-03 — it released about 250 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.