(Eagle News) — Five volcanic earthquakes were monitored at Kanlaon in 24 hours. The Philippine Institute of Volcanology and Seismology said also monitored at the volcano, which remains on alert level 1, was sulfur dioxide emission. PHIVOLCS said the emission was measured at an average of 467 tons on January 31. It said based on data, there was a slight inflation of the lower and middle slopes since June 2020, which “may indicate hydrothermal or […]