The U. S. Geological Survey's earthquake map showed that a 3.2 magnitude aftershock shook several Upstate Counties Sunday afternoon.
The U.S.G.S. reported the tremor happened just before 3:30 p.m. with an epicenter 12 kilometers west of Edgefield.
Mike Casey, director of Edgefield County Management, said the tremor appeared to be an aftershock, not a sister earthquake.
Casey said all emergency services are on alert.
Casey said a seismologist from the College of Charleston said Edgefield is experiencing an active situation, but said there's no telling when or if another aftershock or quake could happen again.
The USGS said the epicenter of Sunday's aftershock was about 2 miles away from the epicenter of Friday's 4.1 magnitude quake, which damaged homes and businesses in several Upstate counties.
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