QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km E of Enid, Oklahoma

· 5.0 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garfield County 4 kmGrant County 43 kmKingfisher County 51 kmNoble County 53 kmAlfalfa County 57 kmLogan County 64 kmMajor County 65 kmKay County 76 kmBlaine County 79 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
5.0 km below the surface
Felt
no reports yet
Nearest
Garfield County, 4 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2665 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 36.4027, -97.8283. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Garfield County, OK 4 km (3 mi) NW of here earthquakes near Garfield County
Grant County, OK 43 km (27 mi) S of here earthquakes near Grant County
Kingfisher County, OK 51 km (32 mi) N of here earthquakes near Kingfisher County
Noble County, OK 53 km (33 mi) W of here earthquakes near Noble County
Alfalfa County, OK 57 km (36 mi) SE of here earthquakes near Alfalfa County
Logan County, OK 64 km (40 mi) NNW of here earthquakes near Logan County

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

Aftershocks so far

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

  1. 1.9 6 km NNE of Loyal, Oklahoma
  2. 1.5 1 km SW of Hennessey, Oklahoma
  3. 2.4 8 km WNW of Ames, Oklahoma
  4. 1.6 2 km SSE of Meno, Oklahoma
  5. 1.8 6 km NNE of Loyal, Oklahoma
  6. 1.8 4 km ENE of Enid, Oklahoma
  7. 1.5 10 km W of Lamont, Oklahoma
  8. 1.8 9 km W of Lamont, Oklahoma
  9. 1.8 2 km SSE of Meno, Oklahoma
  10. 1.9 10 km W of Lamont, Oklahoma
  11. 1.8 9 km ESE of Jefferson, Oklahoma
  12. 1.9 9 km W of Lamont, Oklahoma
  13. 2.5 7 km E of Nescatunga, Oklahoma
  14. 1.6 7 km E of Nescatunga, Oklahoma
  15. 1.5 6 km WNW of Lucien, 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 14,000 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.