Lava collapses at Mayon trigger 'uson', 3‑kilometer-high ash plumes on Feb. 27

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. (Video courtesy of DOST-PHIVOLCS)

READ: https://mb.com.ph/2026/02/27/lava-collapses-at-mayon-trigger-uson-3kilometer-high-ash-plumes-on-feb-27

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