Mount Etna is Europe's tallest active volcano and is located in Sicily, Italy.Like many other dangerous volcanoes such as Mount St Helens and Mount Vesuvius, Etna is a composite volcano. It has been created by the Earth's active tectonic plate system – the African plate is moving below the Eurasian plate.As the Eurasian plate moves down into the Earth, it melts.ike many other dangerous volcanoes such as Mount St Helens and Mount Vesuvius, Etna is a composite volcano. It has been created by the Earth's active tectonic plate system – the African plate is moving below the Eurasian plate. As the Eurasian plate moves down into the Earth, it melts.