The Philippine Institute of Volcanology and Seismology (Phivolcs) on Monday evening, Oct. 28 warned of significantly elevated sulfur dioxide (SO2) emissions from Kanlaon Volcano, which reached 10,074 tons per day—the fifth-highest level recorded since monitoring began.
Phivolcs reported that Kanlaon Volcano has been releasing increased concentrations of SO2 this year, averaging 1,273 tons per day before the June 3, 2024 eruption. Since then, emissions have surged to an average of 4,210 tons daily.
It noted that sulfuric fumes have been detected in Brgy. Masulog and Canlaon City proper and a lesser degree in Barangays Panubigan and Binalbagan.
Phivolcs warned that prolonged exposure to volcanic SO2, especially for communities near accumulation zones during low wind conditions, can irritate the eyes, throat, and respiratory tract.
Those particularly sensitive include individuals with asthma, lung disease, heart conditions, the elderly, pregnant women, and children.
Residents in affected areas are advised to limit their exposure by avoiding outdoor activities, staying indoors, and sealing doors and windows to block volcanic gas.
Likewise, they are advised to use an N95 facemask if going outside and drink plenty of water to alleviate throat irritation.
For those in sensitive groups, Phivolcs said it is crucial to monitor health and seek medical assistance if severe symptoms arise.
Phivolcs reminded the public that Alert Level 2 (increasing unrest) remains in effect as current volcanic activity could lead to eruptive unrest and a potential increase in alert level.
Residents are strongly advised to remain vigilant and avoid entering the four-kilometer permanent danger zone to minimize risks from volcanic hazards, pyroclastic density currents, ballistic projectiles, and rockfalls.
In the event of ash fall, communities downwind should cover their noses and mouths with a damp, clean cloth or dust mask.
In addition, civil aviation authorities are urged to prevent pilots from flying near the volcano’s summit, as ash and debris from sudden eruptions pose serious risks to aircraft.
Communities along river systems on the southern and western slopes, particularly those affected by lahars and muddy streamflows, should take precautions when heavy rainfall is forecast or underway.