QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

11 km SE of Mayfield, Kansas

· 6.2 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 7 kmKay County 49 kmGrant County 53 kmHarper County 54 kmCowley County 55 kmSedgwick County 56 kmKingman County 74 kmButler County 86 kmNoble 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 1.9 (ml)
Depth
6.2 km below the surface
Felt
no reports yet
Nearest
Sumner County, 7 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2917 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 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 37.1798, -97.4572. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 7 km (4 mi) SSE of here earthquakes near Sumner County
Kay County, OK 49 km (31 mi) NW of here earthquakes near Kay County
Grant County, OK 53 km (33 mi) NE of here earthquakes near Grant County
Harper County, KS 54 km (34 mi) E of here earthquakes near Harper County
Cowley County, KS 55 km (34 mi) W of here earthquakes near Cowley County
Sedgwick County, KS 56 km (35 mi) S of here earthquakes near Sedgwick 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. 2.5 6 km N of Wakita, Oklahoma
  2. 2.9 2 km ENE of Medford, Oklahoma
  3. 1.7 7 km SE of Harper, Kansas
  4. 2.3 4 km SSW of Conway Springs, Kansas
  5. 1.6 12 km SSW of Milan, Kansas
  6. 1.9 1 km NW of Freeport, Kansas
  7. 2.3 8 km NW of Haysville, Kansas
  8. 2.4 12 km W of Belle Plaine, Kansas
  9. 1.6 6 km NE of Anthony, Kansas
  10. 1.7 8 km WSW of Hunnewell, Kansas
  11. 1.6 8 km WSW of Hunnewell, Kansas
  12. 2.6 3 km NNW of Braman, Oklahoma
  13. 2.7 11 km NNW of Nardin, Oklahoma
  14. 3.2 9 km NNE of Harper, Kansas
  15. 2.5 2 km ENE of Medford, 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 1,700 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.