The Philippine Institute of Volcanology and Seismology (Phivolcs) said on Wednesday, Aug. 21 that the volcanic smog or“vog” from Taal Volcano persists amid rising sulfur dioxide (SO2) emissions.
Phivolcs reported in its Taal Volcano bulletin on Wednesday that SO2 emissions rose to 5,128 tons per day on Aug. 20, up from 3,355 tons per day on Aug. 15.
Meanwhile, the ongoing upwelling of hot volcanic fluids in the main crater continues to contribute to the formation of vog.
Phivolcs also observed a “voluminous” plume emission reaching 2,100 meters above the crater before drifting northwest and north-northwest.
It earlier pointed out that wind speed and direction have contributed to the slow dispersal of gases, causing vog in the volcano's nearby communities.
Vog impact
Phivolcs explained that vog, composed of tiny droplets of volcanic gases like SO2, can irritate the eyes, throat, and respiratory system.
Sensitivity varies based on gas concentration and exposure duration, with those having health conditions, the elderly, pregnant women, and children being particularly vulnerable.
To reduce health risks, Phivolcs recommended staying indoors, avoiding outdoor activities, keeping doors and windows closed, using N95 masks, drinking plenty of water, and seeking medical help if necessary.
Vog can also cause acid rain, which may damage crops and corrode metal roofs.
Alert level 1 stays
Phivolcs reminded the public that Alert Level 1 is in effect for Taal Volcano, signaling abnormal conditions.
This level indicates risks of sudden steam-driven or phreatic explosions, volcanic earthquakes, minor ashfall, and hazardous volcanic gas emissions, especially on Taal Volcano Island (TVI).
Continuous high concentrations of volcanic SO2 pose a concern for long-term health impacts on nearby communities.
Phivolcs recommended avoiding entry to TVI, particularly near the Main Crater and Daang Kastila fissure, which areconsidered permanent danger zones.
Local government units are advised to monitor SO2 levels, assess their effects, and implement measures to mitigate these hazards.