A total of 133 rockfall events and 30 pyroclastic density currents (PDC), locally known as “uson,” were recorded at Mayon Volcano in Albay over the past 24 hours, the Philippine Institute of ...

Amid an onset of a dome collapse pyroclastic density current (PDC) or “uson,” the Philippine Institute of Volcanology and ...

After an eruption, DIY cushions of gas help searing torrents of gas, ash, and rock spread miles from their source within a matter of minutes. Pyroclastic flows contain a deadly combination of hot rock ...

More rockfall and pyroclastic density current events as well as sulfur dioxide emission were observed over Mayon Volcano, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) said Friday.

Pyroclastic density currents (PDCs) represent some of the most formidable and complex volcanic phenomena, characterised by a turbulent mixture of solid particles and gases that surge down slopes at ...

Geologists have determined why — unlike in the neighbouring town of Pompeii — the inhabitants of the ancient Roman town of Herculaneum were not well-preserved by the eruption of the volcano Vesuvius ...