(Eagle News) — Volcanic smog or vog has been observed over Taal caldera due to the continued volcanic sulfur dioxide gas emissions from the main crater of the volcano, the Philippine Institute of Volcanology and Seismology said. PHIVOLCS said the high levels of volcanic sulfur dioxide or SO2 gas emissions and steam-rich plumes that rose as much as three kilometers high for the past two days, coupled with the SO2 flux on June 27 that […]