By Connie Calipay LEGAZPI CITY – The Philippine Institute of Volcanology and Seismology (Phivolcs) bared on Tuesday that the sulfur dioxide (SO2) emission of Mayon Volcano increased to 7,115 tonnes per day, the second-highest recorded since volcanic gas concentrations started declining on July 16. In its advisory, the agency said the latest SO2 reading was based […]
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