The Philippine Institute of Volcanology and Seismology (PHIVOLCS) released an advisory on Monday saying that they have monitored volcanic smog or ‘vog’ at the Taal Volcano caldera. Phivolcs said that this is due to the continued emission of volcanic sulfur dioxide (SO2) from the main crater. “SO2 flux yesterday, 27 June 2021, averaged 4,771 tonnes/day …

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