QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

2 km ESE of Cynthiana, Indiana

· 19 km deep · released about 220 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gibson County 18 kmVanderburgh County 20 kmPosey County 23 kmWabash County 33 kmWarrick County 37 kmEdwards County 41 kmHenderson County 44 kmWhite County 44 kmPike County 46 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 2.6 (md)
Depth
19 km below the surface
Felt
68 reports · strongest reported intensity IV
Nearest
Gibson County, 18 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 337 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 68 people have reported feeling it to USGS.

How big was it?

This earthquake released about 220 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 68,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 48,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.3× the energy of this one
  4. This earthquake M 2.6 about 220 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 38.1780, -87.6838. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gibson County, IN 18 km (11 mi) SSW of here earthquakes near Gibson County
Vanderburgh County, IN 20 km (12 mi) NNW of here earthquakes near Vanderburgh County
Posey County, IN 23 km (14 mi) NE of here earthquakes near Posey County
Wabash County, IL 33 km (20 mi) SSE of here earthquakes near Wabash County
Warrick County, IN 37 km (23 mi) WNW of here earthquakes near Warrick County
Edwards County, IL 41 km (26 mi) SE of here earthquakes near Edwards County

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

Aftershocks so far

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

  1. 3.5 6 km NE of West Salem, Illinois
  2. 2.1 5 km WNW of Grayville, 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.