QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

8 km WSW of Blanchard, Oklahoma

· 6.6 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 17 kmMcClain County 28 kmCleveland County 39 kmCanadian County 53 kmOklahoma County 58 kmCaddo County 59 kmGarvin County 59 kmStephens County 71 kmPottawatomie County 72 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
6.6 km below the surface
Felt
no reports yet
Nearest
Grady County, 17 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2396 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 13 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 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 35.1098, -97.7403. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 17 km (10 mi) NE of here earthquakes near Grady County
McClain County, OK 28 km (18 mi) WNW of here earthquakes near McClain County
Cleveland County, OK 39 km (24 mi) WSW of here earthquakes near Cleveland County
Canadian County, OK 53 km (33 mi) SSE of here earthquakes near Canadian County
Oklahoma County, OK 58 km (36 mi) SSW of here earthquakes near Oklahoma County
Caddo County, OK 59 km (36 mi) E of here earthquakes near Caddo 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. 1.5 7 km WSW of Blanchard, Oklahoma
  2. 1.8 3 km WNW of Minco, Oklahoma
  3. 1.6 3 km W of Minco, Oklahoma
  4. 1.6 7 km SW of Blanchard, Oklahoma
  5. 1.6 7 km WSW of Blanchard, Oklahoma
  6. 1.7 6 km WNW of Minco, Oklahoma
  7. 1.6 7 km SW of Blanchard, Oklahoma
  8. 1.6 6 km SW of Blanchard, Oklahoma
  9. 2.3 4 km WNW of Minco, Oklahoma
  10. 1.6 3 km WNW of Minco, Oklahoma
  11. 1.6 4 km WNW of Minco, Oklahoma
  12. 1.6 4 km WNW of Minco, Oklahoma
  13. 1.8 4 km WNW of Minco, Oklahoma
  14. 1.9 2 km WSW of Minco, Oklahoma
  15. 1.7 4 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

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