QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7mb_lg

17 km NNE of Collyer, Kansas

· 10 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Graham County 24 kmTrego County 33 kmSheridan County 38 kmGove County 48 kmRooks County 65 kmNorton County 68 kmEllis County 70 kmDecatur County 75 kmNess County 79 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 2.7 (mb_lg)
Depth
10 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Graham County, 24 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 380 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 39.1852, -100.0515. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Graham County, KS 24 km (15 mi) SW of here earthquakes near Graham County
Trego County, KS 33 km (21 mi) NNW of here earthquakes near Trego County
Sheridan County, KS 38 km (24 mi) ESE of here earthquakes near Sheridan County
Gove County, KS 48 km (30 mi) NE of here earthquakes near Gove County
Rooks County, KS 65 km (40 mi) WSW of here earthquakes near Rooks County
Norton County, KS 68 km (42 mi) S of here earthquakes near Norton County

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

Aftershocks so far

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

  1. 2.5 3 km NE of Bogue, Kansas
  2. 2.8 16 km S of Hill City, Kansas
  3. 2.7 2 km E of Hill City, Kansas
  4. 2.6 6 km SE of Hill City, Kansas
  5. 2.1 9 km SW of Bogue, 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.