State volcanologists on Monday night recorded an episode of lava effusion with collapse-fed pyroclastic density currents (PDCs) or “uson” from Mayon Volcano.

Mayon Volcano logged nine pyroclastic density current signals or uson and 428 rockfalls in the past 24 hours, according to a bulletin of the Philippine Institute of Volcanology…

State volcanologists on Monday night recorded an episode of lava effusion with collapse-fed pyroclastic density currents (PDCs) or “uson” from Mayon Volcano.