QuakeIndex

quarry blast · reviewed by a seismologist

M 1.6ml

9 km ESE of Bray, Oklahoma

· 0.0 km deep · released about 6.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Stephens County 17 kmGarvin County 40 kmGrady County 49 kmMcClain County 53 kmJefferson County 56 kmCarter County 56 kmMurray County 62 kmCotton County 68 kmComanche County 69 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 1.6 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Stephens County, 17 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1223 days ago

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

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 6.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.6 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 34.5970, -97.7320. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Stephens County, OK 17 km (11 mi) NE of here earthquakes near Stephens County
Garvin County, OK 40 km (25 mi) WSW of here earthquakes near Garvin County
Grady County, OK 49 km (31 mi) SSE of here earthquakes near Grady County
McClain County, OK 53 km (33 mi) SSW of here earthquakes near McClain County
Jefferson County, OK 56 km (35 mi) N of here earthquakes near Jefferson County
Carter County, OK 56 km (35 mi) NW of here earthquakes near Carter County

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

Aftershocks so far

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

  1. 1.6 6 km SSE of Dibble, Oklahoma
  2. 1.6 9 km WNW of Velma, Oklahoma
  3. 2.0 8 km W of Velma, Oklahoma
  4. 1.9 7 km WNW of Velma, Oklahoma
  5. 2.1 7 km W of Velma, Oklahoma
  6. 1.8 9 km SE of Dibble, Oklahoma
  7. 3.7 9 km WNW of Velma, Oklahoma
  8. 1.7 9 km SE of Dibble, Oklahoma
  9. 1.8 9 km WNW of Velma, Oklahoma
  10. 1.9 8 km WNW of Velma, Oklahoma
  11. 1.6 9 km SE of Dibble, Oklahoma
  12. 3.0 8 km WNW of Velma, Oklahoma
  13. 1.8 10 km WNW of Velma, Oklahoma
  14. 2.0 9 km WNW of Velma, Oklahoma
  15. 2.0 10 km WNW of Velma, 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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