Volcanic arcs: Ring of Fire - tectonic journeys in E Asia

Lines of volcanoes follow the edges of destructive plate boundaries. They're not just hazards to local populations, they're also signs of growth of continental crust - the ground upon which we live! This short film outlines the tectonics behind these critical phenomena - illustrated by examples from Sumatra. This film is part of a series the accompanies the 4th season of the BBC's Race Across the World. #volcanoes #subduction #tectonics #earthquakes #sumatra