Lava effusion recorded in Mayon as volcano enters 189th day of unrest

A lava effusion with minor Strombolian activity was recorded at the Mayon Volcano on Monday, July 13. SCREENSHOT FROM PHIVOLCS

MANILA, Philippines — A lava effusion with minor Strombolian activity was recorded at the Mayon Volcano between 5:17 p.m. and 5:26 p.m. on Monday, July 13, the Philippine Institute of Volcanology and Seismology (Phivolcs) said.

The said volcanic activity occurred less than two hours after the short-lived lava fountaining that was observed at the volcano’s summit crater between 3:25 p.m. and 3:27 p.m. A fountaning was likewise recorded at 5:52 p.m.

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READ: Lava fountaining recorded in Mayon Volcano

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A minor Strombolian activity is characterized by low-level, intermittent volcanic bursts that eject incandescent lava fragments or bursts of expanding gases into the air.

As Phivolcs said, the volcano has been exhibiting effusive eruptive activity for the 189th consecutive day, generating incandescent lava flows, pyroclastic density currents (PDCs), locally called uson, and rockfalls.

Over the weekend, Phivolcs warned that the record increase in sulfur dioxide (SO2) emissions from Mayon Volcano has elevated the possibility of a more explosive eruption, which could generate larger and longer-traveling pyroclastic density currents on all sectors of the volcano.

READ: More restive Mayon Volcano seen as sulfur emissions hit record high

It could also eject ballistic rock fragments from the summit crater, and produce more widespread ashfall, with impacts potentially worsened by prevailing poor weather conditions. /mr

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