Machine generated contents note: 1.What are volcanoes? -- 2.How volcanoes erupt -- 3.Hawaiian and Icelandic eruptions: fire fountains and lava lakes -- 4.Strombolian eruptions: nature's fireworks -- 5.Vulcanian and Peleean eruptions: great explosions and deadly glowing clouds -- 6.Plinian and Ultraplinian eruptions: the great catastrophes -- 7.The tricky killers: mudflows and degassing -- 8.Geysers and geothermal areas -- 9.Exotic volcanic activity -- 10.Volcanoes on other planets: the terrestrial planets -- 11.The exotic volcanoes of the outer solar system -- 12.Volcano research.