STROMBOLI, ITALY - JUNE 06: Aerial view, from a helicopter, of the Stromboli volcano, one of the most active volcanoes in the world, during an explosion with gas and ash emission.  It is 926 m high and reaches a depth of between 1300 m and 2400 m below sea level. The island is part of the Aeolian Islands archipelago in the province of Messina in northern Sicily on June 06, 2019 in Stromboli, Italy. Italy's nearly 8000 km (5,000 miles) coastlines and islands stretch across the Mediterranean Sea and attract large numbers of both local and foreign tourists during the summer season. (Photo by Fabrizio Villa/Getty Images)