QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km NW of Du Bois, Illinois

· 2.2 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 15 kmPerry County 22 kmJefferson County 31 kmClinton County 40 kmFranklin County 44 kmMarion County 52 kmRandolph County 53 kmJackson County 54 kmSt. Clair County 61 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 (md)
Depth
2.2 km below the surface
Felt
no reports yet
Nearest
Washington County, 15 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2107 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 46 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 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 38.2690, -89.2778. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, IL 15 km (10 mi) SE of here earthquakes near Washington County
Perry County, IL 22 km (14 mi) NNE of here earthquakes near Perry County
Jefferson County, IL 31 km (19 mi) W of here earthquakes near Jefferson County
Clinton County, IL 40 km (25 mi) SSE of here earthquakes near Clinton County
Franklin County, IL 44 km (27 mi) NW of here earthquakes near Franklin County
Marion County, IL 52 km (33 mi) SW of here earthquakes near Marion County

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

Aftershocks so far

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

  1. 2.4 4 km NNE of Valier, Illinois
  2. 2.3 7 km NW of Woodlawn, Illinois
  3. 2.8 1 km NNE of Germantown, Illinois
  4. 2.5 6 km ENE of Pinckneyville, Illinois
  5. 3.1 5 km WNW of Waltonville, Illinois
  6. 2.2 1 km S of Benton, Illinois
  7. 2.5 6 km NNW of Mount Vernon, Illinois
  8. 2.4 3 km E of Junction City, Illinois
  9. 2.0 4 km NNW of Venedy, Illinois

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.