QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

10 km SSE of Waldron, Kansas

· 9.9 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 27 kmHarper County 30 kmGrant County 34 kmBarber County 60 kmSumner County 67 kmGarfield County 68 kmWoods County 69 kmKingman County 70 kmMajor 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 3.0 (ml)
Depth
9.9 km below the surface
Felt
no reports yet
Nearest
Alfalfa County, 27 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3344 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 36.9202, -98.1295. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 27 km (17 mi) NE of here earthquakes near Alfalfa County
Harper County, KS 30 km (19 mi) S of here earthquakes near Harper County
Grant County, OK 34 km (21 mi) WNW of here earthquakes near Grant County
Barber County, KS 60 km (37 mi) SE of here earthquakes near Barber County
Sumner County, KS 67 km (41 mi) WSW of here earthquakes near Sumner 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

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

  1. 2.3 7 km ESE of Bluff City, Kansas
  2. 2.1 7 km ESE of Bluff City, Kansas
  3. 1.7 7 km ESE of Bluff City, Kansas
  4. 3.1 9 km W of Harper, Kansas
  5. 2.0 9 km S of Anthony, Kansas
  6. 2.6 7 km E of Nescatunga, Oklahoma
  7. 2.3 11 km NE of Wakita, Oklahoma
  8. 2.5 5 km WNW of Medford, Oklahoma
  9. 1.6 6 km NNE of Bluff City, Kansas
  10. 1.8 6 km NNE of Bluff City, Kansas
  11. 2.1 6 km SSE of Harper, Kansas
  12. 3.7 6 km SSE of Harper, Kansas
  13. 1.6 2 km NNE of Bluff City, Kansas
  14. 2.0 10 km WNW of Caldwell, Kansas
  15. 3.1 8 km SE of Pond Creek, 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 4.1 on 2017-03-29 — it released about 45 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.