QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

19 km S of Gayle Mill, South Carolina

· 1.8 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fairfield County 18 kmChester County 20 kmUnion County 39 kmNewberry County 41 kmYork County 50 kmLancaster County 53 kmRichland County 64 kmKershaw County 64 kmCherokee County 67 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 1.7 (md)
Depth
1.8 km below the surface
Felt
no reports yet
Nearest
Fairfield County, 18 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 159 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 34.5228, -81.2473. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fairfield County, SC 18 km (11 mi) NW of here earthquakes near Fairfield County
Chester County, SC 20 km (13 mi) SSW of here earthquakes near Chester County
Union County, SC 39 km (24 mi) ESE of here earthquakes near Union County
Newberry County, SC 41 km (26 mi) NE of here earthquakes near Newberry County
York County, SC 50 km (31 mi) S of here earthquakes near York County
Lancaster County, SC 53 km (33 mi) WSW of here earthquakes near Lancaster County

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

Aftershocks so far

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

  1. 2.1 9 km E of Cross Anchor, South Carolina
  2. 1.9 19 km NW of Winnsboro, South Carolina
  3. 1.9 9 km E of Cross Anchor, South Carolina
  4. 1.8 8 km E of Cross Anchor, South Carolina
  5. 1.9 11 km N of Irmo, South Carolina
  6. 2.4 18 km NW of Winnsboro, South Carolina
  7. 2.3 17 km NW of Winnsboro, 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.