TABACO CITY, ALBAY, Philippines — Light ashfall blanketed parts of Albay on Monday after a pyroclastic density current (PDC) cascaded down the slopes of the restive Mayon Volcano, prompting local authorities to distribute face masks to residents. The Philippine Institute of Volcanology and Seismology (Phivolcs) said the PDC occurred from 6:31 a.m. to 6:46 a.m.