NextGen Day

MANILA, Philippines — The Philippine Institute of Volcanology and Seismology (Phivolcs) indicated on Tuesday that upgrading the alert level of Taal Volcano to level 4 is “not very likely.”

Ma. Antonia Bornas, Phivolcs’ principal science research specialist, said activity at Taal’s main crater was characterized by an upwelling of hot volcanic fluids in its lake, which produced plumes 2,400 meters high. On Monday, sulfur dioxide (SO2) emissions averaged 4,273 tonnes.

Since Saturday, the Taal Volcano has been on alert level 3 (magmatic unrest), meaning that there is magmatic intrusion at the main crater, which could cause subsequent eruptions, she said.

During the 24-hour observation period, three phreatomagmatic bursts were also identified in the Taal Volcano.

On Monday, three eruptions occurred at 9:30 a.m., 9:33 a.m., and 9:36 a.m., producing plumes that ranged in height from 400 meters to 800 meters.

The interaction of magma and water causes phreatomagmatic eruptions. Multiple explosive episodes, spaced at varying intervals, are typical of eruptions.

In the last 24 hours, eight volcanic earthquakes have been reported, all of which were produced by magma movement or eruptions from the volcano. One five-minute volcanic tremor and seven low-frequency volcanic earthquakes are depicted in the graph.

According to Bornas, Taal Volcano’s alert level 3 status might be maintained if comparable phreatomagmatic activity continues, or it could be reduced to alert level 2 (growing unrest) if no phreatomagmatic activity happens in the next two weeks.

Meanwhile, Phivolcs has advised residents of Taal Volcano Island (TVI) and the high-risk barangays of Bilibinwang and Banyaga, Agoncillo and Boso-Boso, Gulod and eastern Bugaan East, Laurel, Batangas, to evacuate due to the risk of pyroclastic density currents and volcanic tsunami if stronger eruptions occur.

TVI and the high-risk barangays of Agoncillo and Laurel must be off-limits. Furthermore, all activities on the Taal Lake should be prohibited, according to Phivolcs.

Communities near the Taal Lake shoreline are also being urged to keep watchful, take precautions against probable airborne ash and vog, and calmly prepare for a possible evacuation if disturbance worsens.

Volcanic smog, often known as vog, is a form of air pollution created by volcanoes. It consists of small droplets of sulfur dioxide, an acidic volcanic gas that can irritate the eyes, throat, and respiratory tract in varying degrees depending on gas concentrations and exposure times.

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