A minor earthquake shook the Irmo area around 6:45 p.m. on Friday the 13th, triggering a surge of 911 calls and prompting questions about the safety of the Dreher Shoals Dam.
According to the South Carolina Department of Natural Resources, the quake registered a magnitude 2.8 and occurred approximately two miles below ground, about three miles from Irmo.
“It sounded like a huge explosion,” said one resident. “There was a loud boom and then a rumbling like thunder in the distance.”…