Mayon Volcano emits pyroclastic density current along Mi-isi gully

MANILA, Philippines — A pyroclastic density current (PDC), locally known as “uson,” was observed at Mayon Volcano on Saturday, according to the Philippine Institute of Volcanology and Seismology (Phivolcs). Phivolcs, in an initial advisory, said an ongoing PDC was seen moving along the Mi-isi gully on the volcano’s south-southwestern slopes. Pyroclastic density currents are fast-moving flows of hot volcanic gas, ash and rock fragments that descend the slopes of a volcano during an eruptive activity. “Current details of the ongoing event: Plume drift is currently going west-southwestward. Estimated PDC run-out is four kilometers,” Phivolcs said in an update. Based on […]... Keep on reading: Mayon Volcano emits pyroclastic density current along Mi-isi gully

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