Mayon Volcano continued its effusive eruption for the 28th straight day on Tuesday, February 3, with the Philippine Institute of Volcanology and Seismology (PHIVOLCS) recording ongoing lava flows, pyroclastic density currents (PDCs), and rockfalls from the crater.

PHIVOLCS said lava flows have reached up to 3.7 kilometers in the Basud gully, 1.6 kilometers in the Bonga gully, and 1.3 kilometers in the Mi-isi gully.

The agency also released a time-lapse video showing glowing lava and PDCs, or “uson,” descending the volcano early Tuesday morning.

PHIVOLCS maintained Alert Level 3 over Mayon and warned the public that entry into the six-kilometer Permanent Danger Zone remains prohibited.

As of Tuesday, PHIVOLCS recorded nine volcanic earthquakes, 304 rockfall events, and 68 PDCs.

The agency also reported a sulfur dioxide emission of 4,642 tons per day as of February 2, while volcanic plumes were mostly obscured by clouds. Ground deformation data indicated continued swelling of the volcano.

Mayon’s activity has forced residents in Albay to evacuate, with Tabaco City declaring a state of calamity due to the ongoing unrest.