The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reports that Mayon Volcano in Albay shows increased volcanic sulfur dioxide (SO2) emissions. According to PHIVOLCS advisories cited by news outlets, SO2 flux rises from Thursday to Friday, with Thursday averaging about 4,569 tonnes per day and increasing to about 7,475 tonnes per day on Friday. PHIVOLCS describes the Friday level as the highest Mayon SO2 emission recorded in the last 16 years. The emissions observed since the eruption began on January 6 average about 2,300 tonnes per day. While SO2 output increases, PHIVOLCS also notes changes in other monitored activity. One report states that rockfall and pyroclastic density current activity decrease during the same period. PHIVOLCS links rising SO2 emissions to the possibility of further eruptive activity at the summit crater. Authorities continue to monitor the volcano and issue advisories based on the evolving combination of gas emissions and eruptive behavior.