QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

South Carolina

· 6.8 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Charleston County 25 kmDorchester County 28 kmBerkeley County 35 kmColleton County 48 kmClarendon County 80 kmOrangeburg County 81 kmBeaufort County 82 kmWilliamsburg County 86 kmBamberg County 89 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 3.3 (md)
Depth
6.8 km below the surface
Felt
2806 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
Nearest
Charleston County, 25 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1742 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2806 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,400× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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 32.9440, -80.1540. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Charleston County, SC 25 km (16 mi) NW of here earthquakes near Charleston County
Dorchester County, SC 28 km (17 mi) ESE of here earthquakes near Dorchester County
Berkeley County, SC 35 km (22 mi) SSW of here earthquakes near Berkeley County
Colleton County, SC 48 km (30 mi) ENE of here earthquakes near Colleton County
Clarendon County, SC 80 km (50 mi) S of here earthquakes near Clarendon County
Orangeburg County, SC 81 km (51 mi) SE of here earthquakes near Orangeburg County

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

Aftershocks so far

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

  1. 1.8 6 km SSW of Ladson, South Carolina
  2. 2.5 6 km SSW of Ladson, South Carolina
  3. 1.6 6 km SSE of Centerville, South Carolina
  4. 1.6 6 km SW of Ladson, South Carolina
  5. 2.9 6 km SW of Ladson, South Carolina
  6. 2.2 3 km SSW of Centerville, South Carolina
  7. 1.9 6 km SSW of Ladson, South Carolina
  8. 1.8 11 km SSW of Centerville, South Carolina
  9. 2.2 1 km NE of Summerville, South Carolina
  10. 2.1 11 km SW of Centerville, South Carolina
  11. 1.6 3 km NNW of Summerville, South Carolina
  12. 1.7 1 km SSW of Sangaree, South Carolina
  13. 2.4 6 km SSW of Ladson, South Carolina
  14. 1.6 5 km SSE of Centerville, South Carolina
  15. 1.5 3 km S of Centerville, South Carolina

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.