QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8mb_lg

3 km E of South Haven, Kansas

· 5.0 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 24 kmKay County 33 kmGrant County 47 kmCowley County 51 kmHarper County 64 kmSedgwick County 71 kmNoble County 75 kmGarfield County 83 kmKingman County 89 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 2.8 (mb_lg)
Depth
5.0 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Sumner County, 24 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3406 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 37.0482, -97.3691. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 24 km (15 mi) SSE of here earthquakes near Sumner County
Kay County, OK 33 km (20 mi) NW of here earthquakes near Kay County
Grant County, OK 47 km (29 mi) NE of here earthquakes near Grant County
Cowley County, KS 51 km (32 mi) WSW of here earthquakes near Cowley County
Harper County, KS 64 km (40 mi) ESE of here earthquakes near Harper County
Sedgwick County, KS 71 km (44 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

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

  1. 2.0 6 km NW of Mayfield, Kansas
  2. 1.5 6 km NW of Mayfield, Kansas
  3. 3.6 9 km W of Lamont, Oklahoma
  4. 3.0 Oklahoma
  5. 2.5 9 km W of Lamont, Oklahoma
  6. 2.3 3 km NNW of Freeport, Kansas
  7. 1.8 7 km ESE of Mayfield, Kansas
  8. 1.6 6 km ESE of Mayfield, Kansas
  9. 2.5 5 km WNW of Medford, Oklahoma
  10. 2.4 7 km ESE of Mayfield, Kansas
  11. 2.1 7 km ESE of Mayfield, Kansas
  12. 3.1 9 km W of Lamont, Oklahoma
  13. 1.6 11 km NNW of Caldwell, Kansas
  14. 2.7 8 km W of Belle Plaine, Kansas
  15. 1.6 5 km SSE 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 4.0 on 2016-11-25 — it released about 63 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.