The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported on Saturday that Mayon Volcano continues to exhibit intensified activity, with ongoing lava effusion and flows observed along multiple gullies.
According to the agency, lava flows were recorded on Friday along the Basud channel (3.8 kilometers), Bonga channel (3.2 kilometers), and Mi-isi channel (1.3 kilometers).
PHIVOLCS also observed episodic minor strombolian activity and short-lived lava fountaining between midnight Friday and midnight Saturday.
Monitoring data showed a total of 52 volcanic earthquakes, including one tremor lasting five minutes. Additionally, 356 rockfall events and one pyroclastic density current (PDC) signal were recorded.
A visible crater glow was noted, while sulfur dioxide emissions reached 1,662 tonnes. Moderate ash plumes rose up to 400 meters above the crater and drifted east and east-southeast.
The volcano remains under Alert Level 3, indicating intensified or magmatic unrest. PHIVOLCS warned of several potential hazards, including rockfalls, landslides, avalanches, ballistic fragments, lava flows, pyroclastic density currents, moderate explosions, and lahars during heavy rainfall.
Authorities reiterated that entry into the six-kilometer permanent danger zone is strictly prohibited, and aircraft are advised to avoid flying close to the volcano due to possible sudden eruptions.
Meanwhile, a bushfire that broke out Thursday night on Mayon’s southern lower slopes—reportedly triggered by a rockfall—was brought under control and subsided by Friday morning.