. >> susan miller and stephen hoffius are the authors of of people of charleston.tv spoke with them when we visited south carolina on of recent city store. >> august 31st 1886 was the largest of earthquake ever to hit the east coast of the estates. there were three epicenters. they were all within ten and 50 miles of charleston, south carolina. the at quake itself was all over the east coast. there was panic in new york city, chicago, detroit, richmond's, a riot because all of the prisoners and state penitentiary demanded to be released. the story when out that there was a right going on. 10,000 people descended on the penitentiary with guns try to put down what they thought was an uprising. all through the south and even down to cuba there was flashes of light that came from the earthquake and glasses were shaking off of the self. so, it was used. >> in fact, it caused a lot of havoc in the area around charleston. it was not known outside charleston. some interesting times for the earthquake to hit because this city and the world is sort of on the cusp of modernit