Gunshots, thunder or explosives? Those were among theories circulating to explain a series of loud booms heard around town early Tuesday morning. As many as 10 booms were heard around 5:30 a.m. by residents in an area that stretched at least from Piedad Road to 1 Mile Mud Bay Road. Some guessed the sounds were shots of bear hunters on the west side of Chilkat Inlet. Ripinsky hillside resident Terry Pardeesaid it was still…