Ages 7 to 14 years. Some of history's greatest recorded disasters involved the spewing magma or falling ash from an erupting volcano. This book takes readers deep under the earth to the source of a volcano's power and then around the world to some of the most spectacular eruptions in history. The book also includes: the dangers of lava and pyroclastic surges; a look at the scientific tools volcanologists use to predict and measure eruptions; famous volcanoes such as Mount Etna, Mount Vesuvius, and Mount Pinatubo.