Mayon Volcano remains under close monitoring by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) as seismic activity persists for 53 days under Alert Level 3.

In its latest 24-hour report issued Friday, lava flows were observed advancing through the Basud, Bonga, and Mi-isi gullies.

PHIVOLCS also detected seven volcanic earthquakes, which generated 308 rockfalls, and recorded sulfur dioxide emissions reaching 2,003 tonnes from the crater.

The United States Environmental Protection Agency has noted that sulfur dioxide can cause respiratory problems and poses risks to people with asthma, particularly children.

A total of 18 pyroclastic density currents, locally referred to as “uson,” were logged. Gas emissions reached as high as 700 meters above the crater before drifting southwest toward the municipalities of Guinobatan and Camalig.

At 8:21 p.m. Friday, PHIVOLCS recorded and posted footage on social media showing an effusive eruption that produced glowing lava flows and pyroclastic density currents.

Authorities continue to advise residents to refrain from entering the six-kilometer permanent danger zone. Aircraft have also been prohibited from flying near the volcano’s perimeter while Alert Level 3 remains in effect.

PHIVOLCS warned that Mayon is prone to landslides, lava flows, and the ejection of rock fragments, with the possibility of a moderate-sized explosion under current conditions.

Aside from Mayon, Mount Kanlaon, which recorded two moderate explosions within a week, and Taal Volcano remain under their respective alert levels as PHIVOLCS continues to monitor volcanic activity.