QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

6 km SSW of Bradley, Oklahoma

· 19 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 27 kmMcClain County 33 kmStephens County 39 kmGarvin County 40 kmCleveland County 56 kmMurray County 70 kmComanche County 71 kmCaddo County 71 kmCarter County 75 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 1.7 (ml)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Grady County, 27 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 447 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 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 34.8197, -97.7248. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 27 km (17 mi) SSE of here earthquakes near Grady County
McClain County, OK 33 km (21 mi) SW of here earthquakes near McClain County
Stephens County, OK 39 km (25 mi) NNE of here earthquakes near Stephens County
Garvin County, OK 40 km (25 mi) WNW of here earthquakes near Garvin County
Cleveland County, OK 56 km (35 mi) SW of here earthquakes near Cleveland County
Murray County, OK 70 km (44 mi) WNW of here earthquakes near Murray County

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

Aftershocks so far

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

  1. 1.7 4 km ESE of Ratliff City, Oklahoma
  2. 1.6 4 km ESE of Ratliff City, Oklahoma
  3. 1.6 4 km S of Tatums, Oklahoma
  4. 1.6 3 km SE of Ratliff City, Oklahoma
  5. 2.5 4 km SW of Cole, Oklahoma
  6. 2.1 2 km NE of Dibble, Oklahoma
  7. 2.8 2 km NE of Dibble, Oklahoma
  8. 1.9 2 km NE of Dibble, Oklahoma
  9. 2.4 2 km NE of Dibble, Oklahoma
  10. 2.0 2 km NE of Dibble, Oklahoma
  11. 1.8 2 km NNE of Dibble, Oklahoma
  12. 1.6 2 km NNE of Dibble, Oklahoma
  13. 2.0 3 km SSW of Dibble, Oklahoma
  14. 1.5 2 km SE of Erin Springs, Oklahoma
  15. 1.5 5 km ESE of Amber, 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

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