For about three decades, Richard and Laceda Waring have lived in a rancher in York, a couple of blocks away from a limestone quarry. Every so often, the earth rumbles, and the house shakes.
"Well, there's our daily blast," they'll say.
It's happened when they eat at a local diner nearby in West Manchester Township, surprising the other patrons.
"Sometimes I think we're going to go right down through the floor," Laceda Waring said with a laugh.