QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6mwr

7 km SE of Madison, Ohio

· 5.0 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 19 kmAshtabula County 27 kmGeauga County 31 kmTrumbull County 50 kmCuyahoga County 56 kmPortage County 65 kmCrawford County 72 kmMercer County 77 kmMahoning 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 3.6 (mwr)
Depth
5.0 km below the surface
Felt
1722 reports · strongest reported intensity VI
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
Lake County, 19 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 263 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1722 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.9× more

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 41.7313, -80.9720. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, OH 19 km (12 mi) ESE of here earthquakes near Lake County
Ashtabula County, OH 27 km (17 mi) SW of here earthquakes near Ashtabula County
Geauga County, OH 31 km (19 mi) NNE of here earthquakes near Geauga County
Trumbull County, OH 50 km (31 mi) NNW of here earthquakes near Trumbull County
Cuyahoga County, OH 56 km (35 mi) ENE of here earthquakes near Cuyahoga County
Portage County, OH 65 km (41 mi) NNE of here earthquakes near Portage County

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

Aftershocks so far

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

  1. 2.0 1 km W of North Perry, Ohio
  2. 2.0 3 km SE of Madison, Ohio
  3. 2.2 5 km W of Rock Creek, Ohio
  4. 2.1 2 km SE of Madison, Ohio
  5. 2.2 6 km SE of Madison, Ohio
  6. 2.3 4 km SE of Madison, Ohio
  7. 2.9 3 km SW of Madison, Ohio
  8. 2.2 3 km SSE of Madison, Ohio
  9. 2.7 4 km ENE of North Madison, Ohio
  10. 2.3 2 km SSE of Madison, Ohio
  11. 2.5 4 km ESE of Madison, Ohio
  12. 2.0 2 km ESE of Madison, Ohio
  13. 1.8 5 km NW of Lakeline, Ohio
  14. 2.2 2 km ESE of Madison, Ohio
  15. 1.7 1 km ESE of Madison, Ohio

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 4.0 on 2019-06-10 — it released about 4 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.