Gender reveal party using 36kg explosives triggers earthquake reports AP/New Hampshire Photo (for illustrative purposes): Alamy The person who purchased and detonated the explosives has turned himself into police. 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.