The Philippine Institute of Volcanology and Seismology (Phivolcs) raised on Saturday morning Alert Level 3 over Taal Volcano after logging increased unrest from the volcano since Friday.
The volcano was under Alert Level 2 previously.
Phivolcs said that it logged “a short-lived phreatomagmatic burst which was followed by nearly continuous phreatomagmatic activity that generated plumes 1,500 meters accompanied by volcanic earthquake and infrasound signals,” in the morning of Friday.
“In view of the above, DOST-Phivolcs is now raising the alert status of Taal from Alert Level 2 to Alert Level 3. This means that there is magmatic intrusion at the Main Crater that may further drive succeeding eruptions,” it added.
The agency also recommended an evacuation of residents from the Taal Volcano Island and high-risk barangays of Bilibinwang and Banyaga, Agoncillo and Boso-boso, Gulod and eastern Bugaan East, Laure in Batangas.
Phivolcs also advised “communities around the Taal Lake shores are advised to remain vigilant, take precautionary measures against possible airborne ash and vog and calmly prepare for possible evacuation should unrest intensify.”
On Friday night, Phivolcs said it detected over the past 24 hours two volcanic tremors lasting two minutes, and an upwelling of hot volcanic fluids generating plumes 1,000 meters high.