Volcanic avalanches of rock and gas may be more destructive than previously thought
High-pressure pulses in the flows would act like a jackhammer on obstacles
![A pyroclastic flow, or an avalanche of gas, ash and rock, flowing down a volcano](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/01/011421_NO_pyro-flow_feat.jpg?fit=1030%2C580&ssl=1)
Pyroclastic flows — volcanic avalanches of gas, ash and rock — possess rhythmic, high-pressure pulses, a new study suggests.
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