ITALY - Campi Flegrei in Naples is showing “signs of unrest”, which has sparked concern it may be about to erupt. But could the volcano destroy Naples? The volcano is one of the few active super volcanoes in the world. This means it could potentially erupt at the highest level measured by the Volcanic Explosive Index. Camp Flegrei is an almost 13 kilometre wide volcanic crater, home to more than 1.5 million people. Volcano hazard expert Dr Christopher Kilburn, a professor the University College London has warned Campi Flegrei is “active and will erupt again”.