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MANILA, Philippines -- State seismologists on Monday noted a "remarkable increase" in the seismic activity of Taal Volcano in Batangas, recording a total of 115 volcanic earthquakes in the past 24 hours.
The Philippine Institute of Volcanology and Seismology said in an 8 a.m. advisory that 12 of these volcanic quakes were felt at Intensities 1 to 4 by residents of Pira-piraso, Alas-as and Calauit, which were located at the northeast, southwest, and southeast sectors of the volcano island.
"All of these felt events were reportedly accompanied by rumbling sounds," Phivolcs said.
The advisory also noted that the Main Crater Lake registered a "slight increase" in water temperature from from 32.5°C to 32.8°C. Carbon dioxide (CO2) emissions from the volcano also doubled.
With this, Phivolcs has reminded the public that Alert Level 2 remains over the restive Taal Volcano. "This means that magma has been intruding towards the surface, as indicated by the continuing high level of seismic activity and sustained high emission rate of CO2 being released in the Main Crater Lake," it said.
The public is advised to avoid the Main Crater, Daang Kastila Trail and Mt. Tabaro areas due to possible accumulation of toxic gases and risk of steam-driven explosions. Phivolcs warned that breathing toxic gases is lethal both to humans and animals and can cause damage to plants.
Phivolcs also stressed that the entire Volcano Island is a Permanent Danger Zone (PDZ) and permanent settlement in the island is "strictly not recommended."