This volcano is located in Italy. This is a big threatening volcano that shown its power to the earth once. It was in 1st century BC when a powerful explosion erased the cities of Pompey and Herculano (Ercolano now days), and killed around of 25000 people. Now days close to this volcano, 3 million people live, and the fact that worries the scientists, is that the volcano has been sleeping for so long. This means, the next explosion will be a very big one. We just don’t know when it will be.