QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

11 km WNW of Jonesboro, Illinois

· 7.4 km deep · released about 7.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Union County 13 kmCape Girardeau County 28 kmAlexander County 33 kmJackson County 34 kmPulaski County 37 kmPerry County 44 kmJohnson County 45 kmWilliamson County 49 kmScott County 50 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 1.6 (md)
Depth
7.4 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Union County, 13 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 382 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 7.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.3 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 37.4785, -89.3932. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Union County, IL 13 km (8 mi) W of here earthquakes near Union County
Cape Girardeau County, MO 28 km (17 mi) ENE of here earthquakes near Cape Girardeau County
Alexander County, IL 33 km (21 mi) N of here earthquakes near Alexander County
Jackson County, IL 34 km (21 mi) S of here earthquakes near Jackson County
Pulaski County, IL 37 km (23 mi) NW of here earthquakes near Pulaski County
Perry County, MO 44 km (28 mi) SE of here earthquakes near Perry County

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 1.9 6 km WNW of Cape Girardeau, Missouri

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.