QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

1 km S of Benton, Illinois

· 1.9 km deep · released about 69 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Franklin County 1 kmWilliamson County 28 kmHamilton County 36 kmJefferson County 36 kmPerry County 41 kmSaline County 42 kmJackson County 46 kmJohnson County 58 kmWashington County 60 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 2.2 (md)
Depth
1.9 km below the surface
Felt
11 reports · strongest reported intensity IV
Nearest
Franklin County, 1 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1464 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 11 people have reported feeling it to USGS.

How big was it?

This earthquake released about 69 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 220,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 69 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 37.9810, -88.9223. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Franklin County, IL 1 km (1 mi) SSE of here earthquakes near Franklin County
Williamson County, IL 28 km (17 mi) N of here earthquakes near Williamson County
Hamilton County, IL 36 km (22 mi) WSW of here earthquakes near Hamilton County
Jefferson County, IL 36 km (22 mi) S of here earthquakes near Jefferson County
Perry County, IL 41 km (25 mi) ESE of here earthquakes near Perry County
Saline County, IL 42 km (26 mi) NW of here earthquakes near Saline County

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

Aftershocks so far

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

  1. 2.4 4 km NNE of Valier, Illinois
  2. 2.4 4 km WSW of Enfield, Illinois
  3. 2.3 7 km NW of Woodlawn, Illinois
  4. 2.5 6 km ENE of Pinckneyville, Illinois
  5. 3.1 5 km WNW of Waltonville, Illinois
  6. 2.1 9 km E of Thompsonville, 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.