QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

8 km ESE of Perry, Oklahoma

· 7.9 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Noble County 14 kmPayne County 29 kmLogan County 45 kmPawnee County 46 kmGarfield County 54 kmKay County 61 kmLincoln County 69 kmKingfisher County 75 kmGrant County 78 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 1.8 (ml)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Noble County, 14 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2084 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 36.2665, -97.2028. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Noble County, OK 14 km (8 mi) SSE of here earthquakes near Noble County
Payne County, OK 29 km (18 mi) NW of here earthquakes near Payne County
Logan County, OK 45 km (28 mi) NNE of here earthquakes near Logan County
Pawnee County, OK 46 km (28 mi) W of here earthquakes near Pawnee County
Garfield County, OK 54 km (34 mi) ESE of here earthquakes near Garfield County
Kay County, OK 61 km (38 mi) S of here earthquakes near Kay County

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

Aftershocks so far

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

  1. 1.8 8 km NW of Perry, Oklahoma
  2. 1.7 9 km ESE of Mulhall, Oklahoma
  3. 1.9 5 km WNW of Lucien, Oklahoma
  4. 1.7 5 km WNW of Lucien, Oklahoma
  5. 1.6 6 km ENE of Hunter, Oklahoma
  6. 1.6 9 km NW of Perry, Oklahoma
  7. 1.6 4 km W of Lucien, Oklahoma
  8. 1.8 5 km ESE of Covington, Oklahoma
  9. 1.8 5 km ESE of Covington, Oklahoma
  10. 1.8 6 km WNW of Lucien, Oklahoma
  11. 1.9 5 km ESE of Covington, Oklahoma
  12. 3.4 6 km ESE of Covington, Oklahoma
  13. 2.0 5 km ESE of Covington, Oklahoma
  14. 1.8 3 km W of Lucien, Oklahoma
  15. 1.5 5 km ESE of Covington, 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 1,100,000 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.