QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1mb_lg

1 km ESE of Hazelton, Kansas

· 5.0 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 31 kmBarber County 31 kmAlfalfa County 40 kmKingman County 56 kmWoods County 58 kmGrant County 62 kmPratt County 70 kmComanche County 78 kmSumner County 81 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 2.1 (mb_lg)
Depth
5.0 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Harper County, 31 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1511 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 37.0836, -98.3855. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 31 km (19 mi) WSW of here earthquakes near Harper County
Barber County, KS 31 km (19 mi) ESE of here earthquakes near Barber County
Alfalfa County, OK 40 km (25 mi) N of here earthquakes near Alfalfa County
Kingman County, KS 56 km (35 mi) SSW of here earthquakes near Kingman County
Woods County, OK 58 km (36 mi) NE of here earthquakes near Woods County
Grant County, OK 62 km (39 mi) WNW of here earthquakes near Grant 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 9 km E of Nescatunga, Oklahoma
  2. 2.9 10 km SSE of Byron, Oklahoma
  3. 2.0 4 km S of Harper, Kansas
  4. 1.8 1 km NNE of Manchester, Oklahoma
  5. 1.8 7 km E of Nescatunga, Oklahoma
  6. 2.5 7 km E of Nescatunga, Oklahoma
  7. 1.6 7 km E of Nescatunga, Oklahoma
  8. 2.1 6 km NE of Cherokee, Oklahoma
  9. 2.0 5 km NNE of Cherokee, Oklahoma
  10. 2.3 7 km ENE of Nescatunga, Oklahoma
  11. 2.2 11 km SSE of Spivey, Kansas
  12. 2.2 7 km ENE of Nescatunga, Oklahoma
  13. 1.9 1 km NNE of Manchester, Oklahoma
  14. 1.6 8 km ENE of Manchester, Oklahoma
  15. 1.5 8 km ENE of Manchester, 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 2,800 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.