What began as a mysterious ground crack near Birch Creek, Michigan in late 2010 is related to the many mystery booms heard to the south in Wisconsin.   In October 2010,  a massive and unexplained ground crack opened near Birch Creek, Michigan. This year, on March 18th, recurring mysterious booming noises were reported in Clintonville, Wisconsin.  On March 20th, a similar boom was reported just to…