QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

10 km SE of Amber, Oklahoma

· 9.6 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 13 kmMcClain County 32 kmCleveland County 43 kmCanadian County 52 kmCaddo County 55 kmOklahoma County 61 kmGarvin County 61 kmStephens County 69 kmPottawatomie County 76 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 3.3 (ml)
Depth
9.6 km below the surface
Felt
44 reports · strongest reported intensity IV
Nearest
Grady County, 13 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2262 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 44 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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 35.1015, -97.7837. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 13 km (8 mi) NE of here earthquakes near Grady County
McClain County, OK 32 km (20 mi) WNW of here earthquakes near McClain County
Cleveland County, OK 43 km (27 mi) WSW of here earthquakes near Cleveland County
Canadian County, OK 52 km (32 mi) SSE of here earthquakes near Canadian County
Caddo County, OK 55 km (34 mi) E of here earthquakes near Caddo County
Oklahoma County, OK 61 km (38 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

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

  1. 1.9 5 km NE of Union City, Oklahoma
  2. 1.5 6 km NNE of Union City, Oklahoma
  3. 1.5 3 km ENE of Union City, Oklahoma
  4. 1.6 8 km SSE of Erin Springs, Oklahoma
  5. 1.5 4 km S of Tuttle, Oklahoma
  6. 1.6 3 km SSW of Tuttle, Oklahoma
  7. 1.6 3 km SW of Tuttle, Oklahoma
  8. 2.0 2 km NE of Newcastle, Oklahoma
  9. 1.5 2 km SW of Tuttle, Oklahoma
  10. 3.4 7 km SSE of Erin Springs, Oklahoma
  11. 2.3 4 km WNW of Minco, Oklahoma
  12. 1.7 2 km WNW of Minco, Oklahoma
  13. 1.7 3 km WSW of Minco, Oklahoma
  14. 1.5 7 km WSW of Blanchard, Oklahoma
  15. 1.8 3 km WNW 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.