Massive volcanic eruptions can turn day into night, releasing the power of an atomic blast while spewing toxic avalanches of lava, gas, and ash. In this 1997 documentary, National Geographic transports you to some of the world’s most notorious volcanoes including Galeras in Colombia, Mount Pinatubo in the Philippines, and Japan’s Mount Unzen. Join volcanologists Stanley Williams, Maurice and Katia Krafft, and others in their dangerous quest to forecast eruptions and save lives, putting you in the middle of the explosive excitement and human drama.