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Mayon volcano (Luzon Island, Philippines): active lava flows continue to advance

The actively growing lava dome in the inner summit vent at Mayon (image: jaime s. sincioco)

No significant change in the activity occurred since the last update.

The lava flow fronts on the southern Mi-si and southeastern Bonga ravines have advanced 300 meters further downslope since the last update, currently 1.8 km distance from the summit.

Over the past 24 hours, seven incandescent dome-block avalanches and nearly 300 rock fall events have been observed, reaching a considerable distance of about 3,3 km from the crater by detaching from the summit lava dome. Viscous lava is erupting in the summit dome and piling up there. The growing lava dome is more and more unstable as hot lava material is being accumulated in it, which makes the dome prone to collapse into hot rock falls.

Near-constant emissions of steam-laden plumes (so-called degassing) rose 800 meters above the summit and drifted west. Sulfur dioxide (SO2) emissions reached to a 507 tonnes yesterday.

The short-term electronic tilt monitoring continues to detect the upper southeastern slopes inflated since February this year. However, the long-term ground deformation suggests the ongoing uplifting of the edifice, on the northwestern and southeastern slopes in particular, since 2020.

In order to mitigate the risk, people are forbidden to enter an area of 6 km distance from the summit crater due to impacts of rockfalls, pyroclastic falls and/or phreatic eruptions.

The alert level for the volcano remains at Level 3.

Source: Philippine Institute of Volcanology and Seismology volcano activity update 21 June 2023

Racing dome blocks through the southern Mi-si and southeastern Bonga ravines during the day yesterday (source: Volcaholic)

Mayon volcano at dusk yesterday, incandescent avalanches of lava dome blocks from the summit lava dome continue (source: @HeavilyYours

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