Iain Stewart reveals some surprising facts about the world's most destructive and spectacular natural phenomena, from earthquakes and tsunamis to avalanches and volcanoes.

With its red-hot rivers of lava and clouds of ash, Hawaii's Kilauea volcano has captured the world's attention. But how dangerous are such eruptions? Every year about 60 volcanoes erupt.

the strongest recorded earthquake at 9.5 out of 10 on the Richter scale. The Ring of Fire is also where an estimated 75% of the planet’s volcanoes are located, such as Mount Tambora of Indonesia ...