BIRCH CREEK, Mich. - A Michigan family's property has a sudden unexplained divide. A large unexplained crack now runs 200 yards through the Salewsky family's property, eight miles north of Menominee in Birch Creek. The family thinks it happened yesterday around 9:00 in the morning. The ground raised five feet up, taking trees along for the ride. Some cracks were up two feet wide and five feet deep. "The house shook, the chairs shook," Doug Salewsky said