BBC News By Francesca Marchese image copyrightGetty Images Irene Corsaro will never forget her first driving lesson under a rain of black ash from Mount Etna. Like many Sicilians from Catania, the 18-year-old has learnt quickly how to make her way home on a road covered in volcanic dust during one of the volcano's 11 eruptions in the past three weeks. A 12th eruption was under way on Friday. Every so often, the volcano's four main craters awake with intense, simultaneous blasts. These episodes create a spectacular natural firework display, replete with bubbles, fountains and flows of lava. Within minutes, neighbouring towns and villages are showered with flakes of ash and other debris.