Pyroclasts are emitted during explosive volcanic eruptions and are rapidly transported by a variety of gravity-driven flows. These include pyroclastic density currents (PDCs), debris flows, or lahars, which leave a wide spectrum of sedimentary signatures. A better documentation and understanding of the sedimentary record and its link to the flow dynamics is the key for more accurate predictive analysis, with consequences for over 500 million people living in areas directly at risk from volcanic activity.