MANILA, Philippines — Mayon Volcano in Albay remained under Alert Level 3 as it recorded a total of 162 rockfall events, 50 pyroclastic density currents (PDCs), and one volcanic earthquake over the past 24 hours, according to the Philippine Institute of Volcanology and Seismology (Phivolcs) on Thursday.  In a separate interview with dzMM Teleradyo, Phivolcs Director Teresito Bacolcol explained that PDCs, or uson, are dangerous as they are an avalanche of a mixture of ashes, rocks, and gas that can flow as fast as 100 kilometers per hour. READ: Crater glow seen at Mayon Volcano Wednesday evening Bacolcol also said […]... Keep on reading: Mayon Volcano: 124 rockfalls, 50 pyroclastic currents in 24 hours