QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4mb_lg

7 km NNW of Agra, Kansas

· 5.0 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Phillips County 17 kmSmith County 32 kmFranklin County 44 kmHarlan County 45 kmRooks County 55 kmOsborne County 62 kmNorton County 64 kmWebster County 69 kmFurnas County 76 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 2.4 (mb_lg)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Phillips County, 17 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 429 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 39.8201, -99.1543. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Phillips County, KS 17 km (10 mi) ENE of here earthquakes near Phillips County
Smith County, KS 32 km (20 mi) W of here earthquakes near Smith County
Franklin County, NE 44 km (27 mi) SSW of here earthquakes near Franklin County
Harlan County, NE 45 km (28 mi) SSE of here earthquakes near Harlan County
Rooks County, KS 55 km (34 mi) NNE of here earthquakes near Rooks County
Osborne County, KS 62 km (39 mi) NNW of here earthquakes near Osborne County

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

Aftershocks so far

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

  1. 2.9 5 km SW of Kirwin, Kansas
  2. 2.8 8 km NNW of Stockton, Kansas
  3. 3.3 7 km NNW of Stockton, Kansas
  4. 2.5 11 km NNE of Stockton, Kansas
  5. 2.7 11 km NW of Stockton, Kansas
  6. 3.4 10 km NW of Woodston, Kansas
  7. 2.6 15 km SSW of Riverton, Nebraska

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.