Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 39 · Episode 2 ·
Volcano Hell
It began with a ghastly tragedy. In 1985 the massive Colombian volcano Nevado del Ruiz erupted, melting a glacier and sending a vast landslide of mud down on the people asleep in the town of Armero below. Twenty thousand died. In the aftermath science was set a challenge: to make sure such a catastrophe never happened again, by finding a way of accurately predicting when a volcano will erupt. Now, at last, it seems that one scientist may have met that challenge. Anyone can tell when a volcano becomes active. You can see it and you can smell it. But a volcano can be active for years without erupting. For those living nearby, there is no way they will abandon their homes and livelihoods just
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Episode 2 of season 39 of Horizon: “Volcano Hell”. Aired 2002-01-17. Watch it online free on ZapFlix.