Mayon Volcano’s effusive eruption now on its 19th day – PHIVOLCS

The Mayon Volcano in Albay continued its effusive eruption for the 19th consecutive day as the Philippine Institute of Volcanology and Seismology (PHIVOLCS) observed a notable crater glow on Sunday night.

“Notable crater glow caused by superheated volcanic gas emitted at the summit crater was photographed from the Mayon Volcano Observatory between 06:20 PM to 06:22 PM, 25 January 2026 (PST),” PHIVOLCS said in social media posts at around 9 p.m. Sunday.

As of Sunday morning, lava flow and crater glow was observed from the volcano.

State seismologists also logged one volcanic earthquake, one ongoing tremor, 253 rockfall events, and 44 pyroclastic density currents (PDCs) or “uson.”

Moderate plumes rose up to 600 meters above the crater and drifted in the southwest and northeast direction.

PHIVOLCS added that the volcano emitted 2,327 tons of sulfur dioxide flux each day.

On Saturday night, PHIVOLCS reported that lava flow from the volcano's summit crater reached an approximate distance of 1.3 to 3.2 kilometers downslope of the Mi-isi, Bonga, and Basud Gullies.

In separate posts on Sunday afternoon, PHIVOLCS said it conducted a visual observation of the lava flow and PDCs from Mayon Volcano as the data will be used to measure the run-out distance of the lava flows and PDCs.

It also conducted a spring discharge survey around the volcano, adding that variations in discharge are linked to changes in the groundwater system and may provide insights on subsurface processes, including ground deformation.

PHIVOLCS is also conducting regular repair and preventive maintenance of the Mayon Volcano Network (MVN) around the volcano to “ensure continuous uptime and reliable data transition from the remote monitoring stations to the Mayon Volcano Observatory (MVO). — JMA, GMA Integrated News