
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) has recorded another pyroclastic density current (PDC) or “uson” as it went down the slopes of the Mayon Volcano before dawn Monday.

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) has recorded another pyroclastic density current (PDC) or “uson” as it went down the slopes of the Mayon Volcano before dawn Monday.