Mula sa Alert Level 0 o Normal, itinaas ng Phivolcs ang Bulkang Mayon sa Alert Level 1 o Low-Level Unrest.
“Daily visual and camera monitoring of the summit crater revealed that the remnant lava dome emplaced towards the end of the 2018 eruption has undergone a change in morphology and slight extrusion by approximately 40,000 m3 between 6 June and 20 August 2022,” paliwanag ng Phivolcs sa inilabas na abiso bandang 4:00, Linggo ng hapon (Agosto 21).
Nagkaroon anila ng bahagyang short-term inflation sa volcano edifice, partikular sa northwestern at southeastern slopes simula noong buwan ng Abril.
Samantala, malapit naman sa baseline level ang sulfur dioxide (SO2) na nasa 688 tonnes kada araw noong Agosto 12.
May naitala ring low-frequency volcanic earthquakes noong Mayo 26 at Hunyo 20, ngunit nilinaw ng Phivolcs na karamihan sa taong 2022, tanging baseline seismic activity lamang ang nade-detect.
“These observation parameters indicate that volcanic gas-induced pressurization at the shallow depths of the edifice may be occuring, causing the summit dome of Mayon to be pushed out,” dagdag ng Phivolcs.
Paalala naman ng ahensya sa publiko, huwag pumasok sa 6-kilometer Permanent Danger Zone (PDZ) dahil sa maaring maitalang phreatic eruption, rockfalls, at ash bursts sa summit area.
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