(Eagle News)–The Philippine Institute of Volcanology and Seismology raised the alert level over Mayon Volcano to 1 following what it said was low-level unrest. PHIVOLCS came to the conclusion after ground deformation was observed on top of some low-frequency volcanic earthquakes earlier this year. PHIVOLCS said through visual and camera monitoring, it detected that the “remnant lava dome emplaced towards the end of the 2018 eruption has undergone a change in morphology and slight extrusion” […]