QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

4 km SSE of Manchester, Oklahoma

· 4.7 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 26 kmGrant County 27 kmAlfalfa County 37 kmSumner County 56 kmBarber County 67 kmGarfield County 67 kmKingman County 68 kmKay County 79 kmWoods County 80 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 2.6 (ml)
Depth
4.7 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Harper County, 26 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3109 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 36.9544, -98.0124. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 26 km (16 mi) S of here earthquakes near Harper County
Grant County, OK 27 km (17 mi) NW of here earthquakes near Grant County
Alfalfa County, OK 37 km (23 mi) NE of here earthquakes near Alfalfa County
Sumner County, KS 56 km (35 mi) SW of here earthquakes near Sumner County
Barber County, KS 67 km (41 mi) ESE of here earthquakes near Barber County
Garfield County, OK 67 km (42 mi) NNW of here earthquakes near Garfield 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. 3.0 8 km SE of Byron, Oklahoma
  2. 1.8 4 km N of Anthony, Kansas
  3. 3.8 3 km WNW of Byron, Oklahoma
  4. 2.1 8 km S of Milan, Kansas
  5. 2.7 6 km WNW of Renfrow, Oklahoma
  6. 2.6 1 km SSE of Renfrow, Oklahoma
  7. 1.6 7 km E of Freeport, Kansas
  8. 1.5 0 km NNW of Bluff City, Kansas
  9. 2.7 7 km SW of Wakita, Oklahoma
  10. 2.1 0 km NNW of Bluff City, Kansas
  11. 1.9 6 km SE of Freeport, Kansas
  12. 2.1 0 km NNW of Bluff City, Kansas
  13. 3.0 5 km S of Deer Creek, Oklahoma
  14. 2.0 9 km W of Medford, Oklahoma
  15. 2.6 1 km SSE of Renfrow, 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 4.3 on 2017-09-08 — it released about 350 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.