QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

9 km E of Cross Anchor, South Carolina

· 1.6 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Union County 13 kmLaurens County 30 kmSpartanburg County 38 kmNewberry County 43 kmCherokee County 46 kmChester County 54 kmGreenville County 62 kmYork County 63 kmFairfield County 64 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 1.9 (md)
Depth
1.6 km below the surface
Felt
no reports yet
Nearest
Union County, 13 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 120 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 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 34.6535, -81.7532. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Union County, SC 13 km (8 mi) WSW of here earthquakes near Union County
Laurens County, SC 30 km (19 mi) NE of here earthquakes near Laurens County
Spartanburg County, SC 38 km (24 mi) SE of here earthquakes near Spartanburg County
Newberry County, SC 43 km (27 mi) NNW of here earthquakes near Newberry County
Cherokee County, SC 46 km (29 mi) SSW of here earthquakes near Cherokee County
Chester County, SC 54 km (34 mi) W of here earthquakes near Chester 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. 2.1 9 km E of Cross Anchor, South Carolina
  2. 1.9 19 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.