New footage captures a powerful pyroclastic flow racing down the slopes of Indonesia's Semeru Volcano. The fast-moving ...

Avalanches of ash, gas and rock that cascade downhill during volcanic eruptions may be even more dangerous than scientists had realized. Pulses of high pressure form within these slides, known as ...

Guatemala's Santiaguito volcano unleashes two explosive eruptions accompanied by two dangerous pyroclastic flows. Dense ...

Pyroclastic surges are lethal hazards from volcanoes that exhibit enormous destructiveness through large dynamic pressures of 100–102 kilopascal inside flows that are capable of obliterating ...