QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

5 km SW of Manchester, Oklahoma

· 7.0 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 25 kmGrant County 33 kmAlfalfa County 34 kmSumner County 60 kmBarber County 61 kmKingman County 66 kmGarfield County 70 kmWoods County 74 kmMajor County 83 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
7.0 km below the surface
Felt
no reports yet
Nearest
Harper County, 25 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2029 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 7.8 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 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 36.9642, -98.0832. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 25 km (16 mi) S of here earthquakes near Harper County
Grant County, OK 33 km (20 mi) NW of here earthquakes near Grant County
Alfalfa County, OK 34 km (21 mi) NE of here earthquakes near Alfalfa County
Sumner County, KS 60 km (38 mi) WSW of here earthquakes near Sumner County
Barber County, KS 61 km (38 mi) ESE of here earthquakes near Barber County
Kingman County, KS 66 km (41 mi) S of here earthquakes near Kingman 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 7 km E of Nescatunga, Oklahoma
  2. 3.0 2 km SSW of Cherokee, Oklahoma
  3. 1.6 0 km W of Pond Creek, Oklahoma
  4. 2.7 7 km ENE of Renfrow, Oklahoma
  5. 2.0 2 km SSW of Cherokee, Oklahoma
  6. 2.0 9 km ESE of Jefferson, Oklahoma
  7. 1.6 9 km ESE of Jefferson, Oklahoma
  8. 3.5 9 km ESE of Jefferson, Oklahoma
  9. 2.1 8 km S of Byron, Oklahoma
  10. 2.5 6 km SSE of Bluff City, Kansas
  11. 3.0 5 km SSE of Bluff City, Kansas
  12. 2.0 6 km N of Cherokee, Oklahoma
  13. 1.7 7 km E of Pond Creek, Oklahoma
  14. 1.5 8 km E of Nescatunga, Oklahoma
  15. 1.8 10 km W of Lamont, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2019-05-17 — it released about 15,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.