QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9mb_lg

6 km NE of Norwich, Kansas

· 1.9 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kingman County 31 kmSedgwick County 36 kmSumner County 40 kmHarper County 42 kmReno County 56 kmHarvey County 69 kmGrant County 79 kmBarber County 85 kmPratt County 85 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 2.9 (mb_lg)
Depth
1.9 km below the surface
Felt
2 reports · strongest reported intensity V
Nearest
Kingman County, 31 km W
Status
Reviewed by a seismologist

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

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 37.5019, -97.7946. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kingman County, KS 31 km (19 mi) E of here earthquakes near Kingman County
Sedgwick County, KS 36 km (22 mi) SW of here earthquakes near Sedgwick County
Sumner County, KS 40 km (25 mi) NW of here earthquakes near Sumner County
Harper County, KS 42 km (26 mi) NE of here earthquakes near Harper County
Reno County, KS 56 km (35 mi) SSE of here earthquakes near Reno County
Harvey County, KS 69 km (43 mi) SSW of here earthquakes near Harvey County

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

Aftershocks so far

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

  1. 2.3 Kansas
  2. 2.4 Kansas
  3. 2.4 3 km W of Danville, Kansas
  4. 2.3 6 km SW of Danville, Kansas
  5. 3.2 8 km SW of Danville, Kansas
  6. 2.5 4 km WSW of Danville, Kansas
  7. 2.5 6 km E of Bluff City, Kansas
  8. 2.8 10 km N of Milton, Kansas
  9. 2.4 10 km WNW of Viola, Kansas
  10. 2.6 8 km WNW of Viola, Kansas
  11. 2.2 9 km NNE of Milton, Kansas
  12. 2.4 9 km NW of Viola, Kansas
  13. 3.5 9 km WNW of Viola, Kansas
  14. 2.6 9 km WNW of Viola, Kansas
  15. 3.0 9 km WNW of Viola, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.