QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3mb_lg

10 km SSE of Waldron, Kansas

· 5.0 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 26 kmHarper County 31 kmGrant County 35 kmBarber County 59 kmWoods County 67 kmGarfield County 68 kmSumner County 68 kmKingman County 71 kmMajor County 76 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 2.3 (mb_lg)
Depth
5.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Alfalfa County, 26 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2719 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 36.9149, -98.1500. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 26 km (16 mi) NE of here earthquakes near Alfalfa County
Harper County, KS 31 km (19 mi) SSW of here earthquakes near Harper County
Grant County, OK 35 km (22 mi) WNW of here earthquakes near Grant County
Barber County, KS 59 km (36 mi) SE of here earthquakes near Barber County
Woods County, OK 67 km (42 mi) ENE of here earthquakes near Woods County
Garfield County, OK 68 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

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

  1. 2.6 7 km NNW of Medford, Oklahoma
  2. 1.5 4 km WNW of Danville, Kansas
  3. 2.5 7 km NNW of Medford, Oklahoma
  4. 1.8 9 km W of Bluff City, Kansas
  5. 1.8 6 km SW of Goltry, Oklahoma
  6. 2.2 6 km NE of Cherokee, Oklahoma
  7. 1.7 7 km ENE of Bluff City, Kansas
  8. 1.9 1 km N of Lambert, Oklahoma
  9. 2.4 2 km ENE of Medford, Oklahoma
  10. 1.8 9 km W of Bluff City, Kansas
  11. 2.1 5 km NNE of Medford, Oklahoma
  12. 1.6 4 km SSW of Cherokee, Oklahoma
  13. 2.5 9 km W of Bluff City, Kansas
  14. 1.6 4 km WNW of Danville, Kansas
  15. 1.7 9 km ESE of Jefferson, 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 2018-06-09 — it released about 1,400 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.