QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1mb_lg

9 km SW of Bogue, Kansas

· 5.6 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Graham County 13 kmRooks County 37 kmTrego County 42 kmEllis County 56 kmNorton County 56 kmSheridan County 60 kmPhillips County 65 kmGove County 76 kmDecatur County 82 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 2.1 (mb_lg)
Depth
5.6 km below the surface
Felt
no reports yet
Nearest
Graham County, 13 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 380 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 39.2902, -99.7520. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Graham County, KS 13 km (8 mi) ESE of here earthquakes near Graham County
Rooks County, KS 37 km (23 mi) W of here earthquakes near Rooks County
Trego County, KS 42 km (26 mi) NNE of here earthquakes near Trego County
Ellis County, KS 56 km (35 mi) NW of here earthquakes near Ellis County
Norton County, KS 56 km (35 mi) SSE of here earthquakes near Norton County
Sheridan County, KS 60 km (37 mi) E of here earthquakes near Sheridan County

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

Aftershocks so far

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

  1. 2.4 12 km NE of Damar, Kansas
  2. 2.8 10 km SSW of Stockton, Kansas
  3. 2.8 8 km NNW of Stockton, Kansas
  4. 3.3 7 km NNW of Stockton, Kansas
  5. 2.5 1 km NE of Zurich, Kansas
  6. 2.5 3 km NE of Bogue, Kansas
  7. 2.8 16 km S of Hill City, Kansas
  8. 3.0 2 km SW of Zurich, Kansas
  9. 2.7 2 km E of Hill City, Kansas
  10. 2.6 6 km SE of Hill City, Kansas
  11. 2.7 11 km NW of Stockton, 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 4.6 on 2019-06-22 — it released about 5,600 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.