QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

5 km ESE of Amber, Oklahoma

· 7.5 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 15 kmMcClain County 37 kmCleveland County 46 kmCanadian County 47 kmCaddo County 51 kmOklahoma County 59 kmGarvin County 67 kmStephens County 74 kmPottawatomie 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
7.5 km below the surface
Felt
no reports yet
Nearest
Grady County, 15 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 555 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 14 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 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 35.1450, -97.8237. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 15 km (9 mi) NNE of here earthquakes near Grady County
McClain County, OK 37 km (23 mi) WNW of here earthquakes near McClain County
Cleveland County, OK 46 km (29 mi) W of here earthquakes near Cleveland County
Canadian County, OK 47 km (29 mi) SSE of here earthquakes near Canadian County
Caddo County, OK 51 km (32 mi) E of here earthquakes near Caddo County
Oklahoma County, OK 59 km (37 mi) SW of here earthquakes near Oklahoma County

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

Aftershocks so far

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

  1. 1.6 18 km WNW of Union City, Oklahoma
  2. 1.6 18 km W of Union City, Oklahoma
  3. 1.6 18 km W of Union City, Oklahoma
  4. 2.2 19 km W of Union City, Oklahoma
  5. 1.7 19 km ESE of Hinton, Oklahoma
  6. 1.6 19 km ESE of Hinton, Oklahoma
  7. 1.7 18 km W of Union City, Oklahoma
  8. 1.5 19 km ESE of Hinton, Oklahoma
  9. 1.5 2 km SE of Erin Springs, Oklahoma
  10. 1.5 5 km ESE of Amber, Oklahoma
  11. 1.6 2 km NE of Minco, Oklahoma
  12. 1.5 6 km NNE of Ninnekah, Oklahoma
  13. 1.5 2 km NNE of Minco, Oklahoma
  14. 1.8 2 km ENE of Minco, Oklahoma
  15. 2.0 1 km ENE of Minco, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.