LOOK: Lava effusion, collapse-fed PDCs on Day 140 of Mayon's effusive eruption

State volcanologists observed the occurrence of lava effusion with collapse-fed pyroclastic density currents (PDCs) at Mayon Volcano, which marked its 140th day of effusive eruption on Monday night, May 25, 2026.

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) shared sped up camera footages of the volcanic activity on its social media accounts.

The lava effusion with collapse-fed PDCs or “uson” flowed along Mi-isi and Basud gullies at 7:20 p.m. and 7:26 p.m.

PHIVOLCS also logged minor Strombolian activity at Mayon Volcano.

Minor Strombolian activity is defined as a low-level, intermittent explosion that launches lava fountains and magma fragments from the crater.

Mayon Volcano’s effusive eruption persisted for the 140th consecutive day, generating incandescent lava flows, PDCs, and rockfalls.

Earlier on Monday, PHIVOLCS said more volcanic earthquakes and higher sulfur dioxide emissions were recorded in the past 24-hour monitoring period.

In its last bulletin, PHIVOLCS logged 45 volcanic earthquakes, including four volcanic tremor episodes at Mayon Volcano.

Mayon Volcano remains under Alert Level 3, which means a state of intensified unrest or magmatic unrest.

Entry into its six-kilometer Permanent Danger Zone (PDZ) is prohibited. — JMA, GMA News