This is ground zero for the largest volcanic eruption in the past two million years Toba on the island of Sumatra. What is the structure of the volcanic complex? What can we learn from the landscape and some preliminary geophysical experiments? This is one of a series of films made to accompany the BBC's 4th series of "Race Across the World" looking a geology of this stunning region.
#geology #Tobacaldera #tobalake #tectonics #ratw #volcano #ringoffire