Manila Bulletin – Lava collapses at Mayon trigger ‘uson’, 3‑kilometer-high ash plumes on Feb. 27
Published Feb 27, 2026 03:24 pm The Philippine Institute of Volcanology and Seismology (Phivolcs) reported two pyroclastic density current (PDC) events, or “uson,” at Mayon Volcano on Friday, Feb. 27, following collapses from lava flows along the Bonga Gully. The first PDC began at 12:40 p.m., followed by another at 2:05 p.m., each lasting about one … Read more