Philippine Standard Time

00 volcano icon for bulletin Mayon Volcano’s monitoring network recorded one (1) rockfall event and ten (10) volcanic earthquakes during the past 24-hour observation period. These events had a magnitude range of ML1.1 to ML3.1 and the strongest of these recorded at 7:41 am yesterday was felt at Intensity I in the center of the municipality of Sto. Domingo, Albay. Activity at the summit crater consisted of moderate emission of white steam-laden plumes that crept downslope before drifting west and west-southwest. Faint crater glow could also be observed during night time. Sulfur dioxide (SO2) emission was last measured at an average of 222 tonnes/day on 25 February 2021. Ground deformation data from continuous GPS monitoring indicate that the edifice is still inflated relative to July 2019 despite a period of general deflation since July-August 2020, and has been undergoing short-term inflation since November 2020. Deflation of the edifice with short-term inflation of the northwestern slopes since December 2020 has also been recorded by electronic tilt monitoring.


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.