A fresh column of volcanic ash climbed roughly 13,000 feet above Mayon volcano in late May 2026, blanketing towns across Albay province in gritty gray dust and forcing thousands more residents to weigh whether to stay or leave. The plume was the latest in a string of eruptions that began in mid-May 2026 and have now continued for about two weeks without pause, dumping more than 22 million cubic meters of lava and debris onto the volcano’s upper slopes, according to the Philippine Institute of Volcanology and Seismology (PHIVOLCS).
Nearly 200,000 people across the province have been affected. More than 5,400 have evacuated their homes, many carrying little more than documents and clothing, the Associated Press reported. Schools in several municipalities have suspended in-person classes, and farmers in the surrounding lowlands are watching ash settle on rice paddies and coconut groves that supply much of the local economy.
Steady lava, not a single blast
PHIVOLCS director Teresito Bacolcol told the Associated Press that there has been “no explosive eruption.” That distinction is critical. Mayon is not blowing its top in the catastrophic sense most people picture. Instead, lava has been oozing continuously from the summit crater and piling up along the steep upper flanks, a pattern volcanologists call effusive activity.
The recurring ash plumes are a byproduct of that buildup. A government explainer published by the Philippine Information Agency describes the mechanism: as fresh lava accumulates on Mayon’s near-perfect cone, chunks of the hot deposit become unstable and collapse downhill. The rapid fragmentation of that superheated rock throws fine ash thousands of feet into the air and can trigger short-lived pyroclastic density currents along drainage channels. Volcanologists call these secondary explosions, because they are driven by gravity and breakup of already-erupted material rather than by pressurized magma forcing its way through a sealed vent.
The word “explosion” in that term can be misleading. A secondary explosion is a localized collapse event, not the kind of full-scale eruption that killed more than 1,200 people when Mayon blew in 1814 or that forced mass evacuations during its most recent major episode in January 2018. But the ash it produces is real, and so are the health risks: fine volcanic particulates can aggravate respiratory conditions, contaminate drinking water, and damage crops even tens of kilometers from the crater.
What the numbers show
The 22 million cubic meter volume estimate, reported through the Philippine News Agency, is the most concrete measure of Mayon’s output so far. That figure reflects cumulative lava and volcanic debris expelled since the eruption began in mid-May 2026, calculated by PHIVOLCS using ground-based measurements and satellite imagery. Because the eruption has continued since that estimate was published, the actual total is almost certainly higher now, though updated numbers have not yet appeared in official channels.
The 13,000-foot plume height, widely cited in news coverage, is consistent with the scale of secondary explosions described in government technical documents. However, the specific measurement traces to secondary news summaries rather than a publicly available PHIVOLCS daily monitoring bulletin, so readers should treat the precise altitude as approximate.
Displacement data carries similar caveats. The count of more than 5,400 evacuees and roughly 200,000 affected residents comes from wire reporting that aggregates local government tallies. The methodology behind those tallies and the exact date of the count have not been specified in available reporting. Granular information on evacuation shelter capacity, food supply timelines, and medical resources for displaced families has been sparse.
Why Mayon demands close watching
Mayon is the most active volcano in the Philippines, with more than 50 recorded eruptions since 1616. Its symmetrical cone, a tourism draw in calmer times, is also what makes it dangerous: lava and debris can funnel rapidly down multiple flanks toward populated barangays with little warning. Albay province sits on the southeastern coast of Luzon, and several towns lie within the permanent danger zone that PHIVOLCS maintains around the summit.
During the 2018 eruption, authorities raised the alert to Level 4 (hazardous eruption imminent) and evacuated tens of thousands. The current episode has not reached that threshold, but the sustained two-week pattern of lava effusion and secondary explosions keeps the situation volatile. Effusive eruptions can shift to explosive ones if conditions inside the magma chamber change, and PHIVOLCS has cautioned that the volcano’s behavior could still escalate.
Life in Albay’s ash zone grinds on as Mayon keeps erupting
For now, daily existence in the shadow of the volcano is a grinding routine of face masks, roof sweeping, and uncertainty. Farmers cannot plant. Children attend class remotely where internet access allows. And every few hours, another gray column rises from the summit, a reminder that Mayon is not finished.
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*This article was researched with the help of AI, with human editors creating the final content.
