QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

9 km WSW of Blanchard, Oklahoma

· 7.6 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 15 kmMcClain County 29 kmCleveland County 40 kmCanadian County 53 kmCaddo County 58 kmOklahoma County 59 kmGarvin County 59 kmStephens County 70 kmPottawatomie County 73 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 1.9 (ml)
Depth
7.6 km below the surface
Felt
no reports yet
Nearest
Grady County, 15 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2267 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 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 35.1047, -97.7508. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 15 km (10 mi) NE of here earthquakes near Grady County
McClain County, OK 29 km (18 mi) WNW of here earthquakes near McClain County
Cleveland County, OK 40 km (25 mi) WSW of here earthquakes near Cleveland County
Canadian County, OK 53 km (33 mi) SSE of here earthquakes near Canadian County
Caddo County, OK 58 km (36 mi) E of here earthquakes near Caddo County
Oklahoma County, OK 59 km (37 mi) SSW of here earthquakes near Oklahoma County

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

Aftershocks so far

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

  1. 2.0 8 km ESE of Chickasha, Oklahoma
  2. 1.5 2 km SE of Chickasha, Oklahoma
  3. 1.5 10 km SSW of Alex, Oklahoma
  4. 1.9 11 km SSW of Alex, Oklahoma
  5. 1.9 4 km SE of Minco, Oklahoma
  6. 2.1 10 km E of Chickasha, Oklahoma
  7. 2.0 9 km E of Chickasha, Oklahoma
  8. 2.8 9 km ESE of Chickasha, Oklahoma
  9. 1.7 8 km ESE of Chickasha, Oklahoma
  10. 1.5 5 km SE of Dibble, Oklahoma
  11. 1.8 3 km NE of Blanchard, Oklahoma
  12. 1.5 3 km ENE of Blanchard, Oklahoma
  13. 1.5 1 km WNW of Dibble, Oklahoma
  14. 1.7 7 km SE of Erin Springs, Oklahoma
  15. 1.5 6 km SSE of Dibble, OK

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.