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Pyroclastic flows: The secret of their deadly speed

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Pyroclastic flows: The secret of their deadly speed

When a volcano erupts, pyroclastic flows are often the biggest danger to anyone nearby. These fast-flowing currents of rock, ash and extremely hot gas are extremely difficult to study, so researchers in New Zealand created their own. By closely studying pyroclastic flows in their specially-made lab, they identified a very thin layer of gas that ...

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