Mayon Volcano’s monitoring network recorded four (4) volcanic earthquakes and six (6) rockfall events during the 24-hour observation period. Moderate emission of white steam-laden plumes that crept downslope before drifting to the general west was observed. Sulfur dioxide (SO2) emission was last measured below baseline average at 436 tonnes/day on 29 October 2020. Ground deformation data based on continuous GPS has recorded inflation of the lower to middle slopes since July 2019. Electronic tilt data also showed non-steady inflation from late 2019 to mid-2020 followed by a short-term deflation of the middle slopes since July 2020. Overall, the Mayon edifice is still inflated with respect to baseline parameters.

DOST-PHIVOLCS would like to remind the public that Mayon Volcano is at Alert Level 1, which means that it is at an abnormal condition. Although this means that presently no magmatic eruption is imminent, it is strongly advised that the public refrain from entering the 6-kilometer radius Permanent Danger Zone (PDZ) due to the perennial life-threatening dangers of rockfalls, landslides/avalanches at the middle to upper slope, sudden ash puffs and steam-driven or phreatic eruptions from the summit. Active stream/river channels and those identified as perennially lahar-prone areas on all sectors of the volcano should also be avoided especially during extreme weather conditions when there is heavy and prolonged rainfall. DOST-PHIVOLCS maintains its close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders.

DOST-PHIVOLCS