One New Hampshire family’s gender reveal party was such a blast that it rattled towns, set off reports of an earthquake, and could be heard from across the state line, police said. Police in Kingston, a town not far from the Massachusetts border, received reports of a loud explosion Tuesday evening. They responded to Torromeo quarry where they found people who acknowledged holding a gender reveal party with explosives. The source was Tannerite—80 pounds of it, police said. The family thought the quarry would be the safest spot to blow up the explosive, which is typically sold over the counter as a target for firearms practice, police said. “It comes with an oxidizer,” Sgt. Jeff Dade of the New Hampshire State Police Bomb Squad told WMUR. “The fuel is in a separate packet, and you mix it, and once mixed, you would place it somewhere safely out in a range …