QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

7 km SE of Calvin, Oklahoma

· 3.0 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hughes County 15 kmCoal County 39 kmPittsburg County 40 kmSeminole County 46 kmPontotoc County 51 kmAtoka County 61 kmOkfuskee County 61 kmMcIntosh County 68 kmPottawatomie County 77 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 1.5 (ml)
Depth
3.0 km below the surface
Felt
no reports yet
Nearest
Hughes County, 15 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2190 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 34.9283, -96.1880. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hughes County, OK 15 km (9 mi) SSE of here earthquakes near Hughes County
Coal County, OK 39 km (25 mi) NNE of here earthquakes near Coal County
Pittsburg County, OK 40 km (25 mi) W of here earthquakes near Pittsburg County
Seminole County, OK 46 km (28 mi) SE of here earthquakes near Seminole County
Pontotoc County, OK 51 km (32 mi) ENE of here earthquakes near Pontotoc County
Atoka County, OK 61 km (38 mi) NNW of here earthquakes near Atoka County

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

Aftershocks so far

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

  1. 1.6 5 km NNE of Sasakwa, Oklahoma
  2. 1.7 12 km NNE of Arpelar, Oklahoma
  3. 1.9 11 km E of Lamar, Oklahoma
  4. 1.6 6 km S of Yeager, Oklahoma
  5. 1.6 6 km S of Yeager, Oklahoma
  6. 1.6 7 km ESE of Arpelar, Oklahoma
  7. 1.8 6 km SSE of Yeager, Oklahoma
  8. 1.5 8 km NNE of Stonewall, Oklahoma
  9. 1.7 5 km SSE of Yeager, Oklahoma
  10. 3.1 6 km SSE of Yeager, Oklahoma
  11. 1.5 9 km ESE of Ada, Oklahoma
  12. 2.5 5 km NNW of Arpelar, Oklahoma
  13. 1.9 5 km WNW of Hanna, Oklahoma
  14. 2.1 5 km WNW of Horntown, Oklahoma
  15. 1.7 3 km WNW of Horntown, 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.