Facts about volcanoes

  • A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot magma, volcanic ash and gases to escape from the magma chamber below the surface.
  • Volcanism away from plate boundaries has also been explained as mantle plumes. These so-called "hot spots", for example Hawaii, are postulated to arise from up welling diapairs with magma from the core–mantle boundary, 3,000 km deep in the Earth.
  • Erupting volcanoes can pose many hazards, not only in the immediate vicinity of the eruption.
  • Mount Etna is Europe's tallest active volcano and is located in Sicily, Italy.
  • Etna has erupted many times during recorded history and is still very active.