MANILA, Philippines – Mayon Volcano in Albay continued emitting ash and volcanic materials on Thursday, triggering pyroclastic density current (PDC), locally known as “uson” anew, state volcanologists said. According to the Philippine Institute of Volcanology and Seismology (Phivolcs), a footage captured a collapse-fed PDC descending through the Mi-isi Gully on the volcano’s southwestern slopes at