Lava flows continued to descend Mayon Volcano’s slopes in Albay, affecting three gullies while minor ash emissions produced a short plume, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported on Thursday.
In its 24-hour observation summary, Phivolcs recorded lava moving 3.8 kilometers down Basud gully, 2.6 kilometers along Bonga gully, and 1.3 kilometers through Mi-isi gully.
As of Wednesday, the effusive eruption had persisted for 51 consecutive days, producing incandescent lava flows, rockfalls, and pyroclastic density currents or “uson,” Phivolcs said in a Facebook post.
Within the past day, the volcano emitted a plume reaching 600 meters above the crater, drifting west-southwest and southwest.
Sulfur dioxide measurements from Mayon reached up to 2,504 tonnes per day on Wednesday, indicating ongoing magmatic activity.
Phivolcs also recorded two volcanic earthquakes, 340 rockfall events, and three signals of pyroclastic density currents during the 24-hour period.
The state volcanology bureau maintained Alert Level 3 over Mayon, signaling intensified or magmatic unrest in the area.
Authorities reminded the public that entry into the six-kilometer permanent danger zone around the volcano remains strictly prohibited.
