The summit of the volcano is currently made of the Central Crater (Voragine and Bocca Nuova), the northern-eastern Crater (1911), and the southern-eastern Crater (1971). The height of the volcano is of about 3,340 meters above sea-level, but this varies because of the accumulation of the material deriving from the explosions on the one side, and on the other because of the frequent collapse of the walls.