Mayon Volcano in Albay province(PNA file photo) LEGAZPI CITY - The Philippine Institute of Volcanology and Seismology (Phivolcs) has raised Mayon Volcano's alert status from Level 0 to Level 1. Level 0 means "normal" while Level 1 signifies "low-level unrest". Phivolcs said daily visual and camera monitoring of the summit crater revealed that the remnant lava dome emplaced toward the end of the 2018 eruption has undergone a change in morphology and slight extrusion by 40,000 cubic meters between June and Aug. 20, this year. The Phivolcs bulletin onSunday said ground deformation observations from Global Positioning Systems (GPS), precise leveling (PL), electronic tilt, and electronic distance meter (EDM) monitoring "have tracked slight short-term inflation of the volcano edifice, particularly on the northwestern and southeastern slopes since April 2022." "In contrast, the latest measured Sulfur dioxide (SO2) emission on 12 August 2022 averaged 688