The Philippine Institute of Volcanology and Seismology (Phivolcs) continues to monitor ash emissions at Kanlaon Volcano, following its 24-hour monitoring period from Tuesday to Wednesday, Dec. 10 to 11.
Phivolcs reported two instances of ash emissions, each lasting 11 to 39 minutes.
It warned that prolonged exposure to ash and volcanic sulfur dioxide (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.
It is also advised to use an N95 facemask if going outside and drink plenty of water to alleviate throat irritation.
Moreover, Phivolcs said a “moderate” sulfur dioxide emission, measured at 4,121 tons per day, produced a 100-meter-high due to continuous degassing and occasional ash emission over the past 24 hours.
Thirty-one volcanic earthquakes were also recorded.
‘Magmatic unrest’ persists
Alert Level 3 (magmatic unrest) remains in effect due to ongoing volcanic activity, indicating the potential for further eruptions.
Local government units (LGUs) have been urged to evacuate residents within the six-kilometer radius of the summit and to remain prepared for additional evacuations if the situation worsens.
On Tuesday evening, Dec. 10, Phivolcs also issued an advisory regarding heavy rainfall affecting the southern slopes of Kanlaon Volcano.
It said the rainfall may trigger rain-induced lahars in rivers that pass through barangays affected by pyroclastic density currents from the explosive eruption on Dec. 9.
LGUs have been advised to monitor these rivers, as well as downstream barangays, in case lahars affect these communities.