Lava effusion, ash clouds at Mayon on Day 73 of effusive eruption

State volcanologists observed lava effusion and collapse on the Mi-isi gully of the Mayon Volcano on Wednesday night as the volcano continued its effusive eruption.

In posts on its social media accounts, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) shared a time lapse video of the volcano’s lava effusion recorded at around 11:13 p.m. Wednesday.

Mayon Volcano’s effusive eruption went on for the 73rd consecutive day, generating incandescent lava flows, pyroclastic density currents (PDC) or “uson,” and rockfalls.

State volcanologists also noted “lava effusion with collapse PDC” on the Mi-isi gully.

Earlier in the day, PHIVOLCS posted a time lapse video recorded at 10:21 a.m. and photos of a series of barely visible PDCs on the Bonga-Mabinit gully of the volcano.

“These events produced brownish-gray ash clouds that rained ashfall on communities on the southwestern slopes of Mayon,” it said in an earlier social media post.

PHIVOLCS reiterated its warning that Alert Level 3 is in effect over the Mayon Volcano and that entry into its six-kilometer permanent danger zone is prohibited. — JMA, GMA Integrated News