The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported Monday that volcanic smog or vog was seen over the Taal Volcano caldera.
In the past 24-hour period, the Taal Volcano Network recorded two (2) volcanic earthquakes and low-level background tremor that has persisted since 08 April 2021.
High levels of volcanic sulfur dioxide or SO2 gas emissions and steam-rich plumes that rose as much as one thousand five hundred (1,500) meters high have been observed from the Taal Main Crater. Sulfur dioxide (SO2) emission averaged 4,771 tonnes/day on 27 June 2021.
Based on ground deformation parameters from electronic tilt, continuous GPS and InSAR monitoring, Taal Volcano Island has begun deflating in April 2021 while the Taal region continues to undergo very slow extension since 2020.
These parameters indicate overall that magmatic unrest continues to occur at shallow depths beneath the edifice.
Alert Level 2 (Increased Unrest) is currently maintained over Taal Volcano. DOST-PHIVOLCS reminds the public that at Alert Level 2, sudden steam- or gas-driven explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within and around TVI.
Volcanic smog over Taal Volcano caldera
DOST-PHIVOLCS strongly recommends that entry must be strictly prohibited into Taal Volcano Island, Taal’s Permanent Danger Zone or PDZ, especially the vicinities of the Main Crater and the Daang Kastila fissure, and occupancy and boating on Taal Lake.
Residents nearby the volcano were advised to limit their exposure to vog by avoiding outdoor activities, staying indoors, and shutting doors and windows.
PHIVOLCS also urged the public to protect themselves and cover the nose, preferably with an N95 face mask.
“Drink plenty of water to reduce any throat irritation or constriction,” it added.
Local government officials are advised to continuously assess and strengthen the preparedness of previously evacuated barangays around Taal Lake in case of renewed unrest.
Civil aviation authorities must advise pilots to avoid flying close to the volcano as airborne ash and ballistic fragments from sudden explosions and wind-remobilized ash may pose hazards to aircraft.
DOST-PHIVOLCS is closely monitoring Taal Volcano’s activity and any new significant development will be immediately communicated to all stakeholders.
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