QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7 km ESE of Mayfield, Kansas

· 2.4 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 2 kmSedgwick County 50 kmHarper County 53 kmKay County 55 kmCowley County 56 kmGrant County 57 kmKingman County 69 kmButler County 82 kmHarvey County 91 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 (ml)
Depth
2.4 km below the surface
Felt
no reports yet
Nearest
Sumner County, 2 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3447 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 38 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 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 37.2352, -97.4702. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 2 km (1 mi) E of here earthquakes near Sumner County
Sedgwick County, KS 50 km (31 mi) S of here earthquakes near Sedgwick County
Harper County, KS 53 km (33 mi) E of here earthquakes near Harper County
Kay County, OK 55 km (34 mi) NNW of here earthquakes near Kay County
Cowley County, KS 56 km (35 mi) W of here earthquakes near Cowley County
Grant County, OK 57 km (36 mi) NNE of here earthquakes near Grant County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.3 8 km SSW of Clearwater, Kansas
  2. 1.5 7 km ESE of Bluff City, Kansas
  3. 2.6 2 km SSE of Clearwater, Kansas
  4. 2.5 10 km WNW of Belle Plaine, Kansas
  5. 2.2 5 km ENE of Milan, Kansas
  6. 1.5 4 km ENE of Milan, Kansas
  7. 2.6 10 km W of Belle Plaine, Kansas
  8. 1.9 4 km NNE of Freeport, Kansas
  9. 1.8 7 km ESE of Bluff City, Kansas
  10. 2.6 10 km W of Belle Plaine, Kansas
  11. 1.9 7 km SE of Harper, Kansas
  12. 1.7 7 km SE of Harper, Kansas
  13. 2.0 6 km SE of Harper, Kansas
  14. 1.8 6 km ESE of Mayfield, Kansas
  15. 1.7 3 km NNW of Freeport, Kansas

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 1,100 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.