Photo courtesy of Philippine News Agency (PNA).
Mayon Volcano in Albay has shown a notable increase in seismic energy, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported on Sunday.
Six of the twelve monitoring stations detected heightened real-time seismic energy, indicating background tremors within the volcano.
Phivolcs said no other volcanic earthquakes were recorded, and the increase may be linked to ongoing effusive activity through Mayon’s open vent.
Data showed that the volcano has not experienced major swelling or ground deformation, although slight inflation has been noted in its eastern sector since mid-2024.
Sulfur dioxide emissions remained near typical background levels, averaging 777 tons per day as of the latest advisory.
The agency said the current seismic activity could signal new magma intrusions, which may lead to additional eruptive events in the coming days.
Mayon remains under Alert Level 3, indicating a lava dome is forming at the summit and continuing to produce lava flows, rockfalls, and pyroclastic density currents.
According to Phivolcs, residents within six kilometers of the crater are advised to stay out of the Permanent Danger Zone due to volcanic hazards.
Meanwhile, residents living within eight kilometers of the volcano should be ready for possible evacuation if activity escalates, and civil aviation authorities have been urged to avoid flights near the summit.
