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Kanlaon Shakes With 81 Quakes; PHIVOLCS Warns Of Possible Eruption
Screengrab from Phivolcs
Kanlaon Volcano is showing signs of restlessness again, with scientists recording 81 volcanic earthquakes between midnight and 10 a.m. on Thursday, October 16, according to the Philippine Institute of Volcanology and Seismology (PHIVOLCS).
The tremors, which ranged from magnitude 0.1 to 2.9, were detected at depths of up to six kilometers beneath the northwestern slopes of the volcano. PHIVOLCS said the quakes were caused by rock fracturing — a sign that magma or volcanic gas may be moving upward toward the surface.
Sulfur dioxide (SO₂) emissions from Kanlaon’s summit were also measured at 1,879 tonnes per day on Wednesday, slightly above its usual average. This steady gas release suggests that the volcano’s system is pressurizing, which could trigger moderate explosive eruptions if the gas remains trapped.
Alert Level 2 remains in effect, meaning the volcano is in a state of increased unrest. PHIVOLCS warned that sudden explosions — whether steam-driven or moderately explosive — could occur anytime, producing ashfall, rockfall, or pyroclastic flows that can endanger nearby communities.
Residents are strictly prohibited from entering the 4-kilometer Permanent Danger Zone (PDZ) and are advised to stay alert within a 6-kilometer radius in case of escalation. Those living near rivers and channels around the volcano should also watch out for lahars or mudflows, especially during heavy rains.
Pilots are likewise cautioned to avoid flying close to Kanlaon’s summit, as ash emissions could pose serious risks to aircraft.
PHIVOLCS assured the public that it is closely monitoring Kanlaon Volcano and will immediately release updates if any significant changes are observed.
The tremors, which ranged from magnitude 0.1 to 2.9, were detected at depths of up to six kilometers beneath the northwestern slopes of the volcano. PHIVOLCS said the quakes were caused by rock fracturing — a sign that magma or volcanic gas may be moving upward toward the surface.
Sulfur dioxide (SO₂) emissions from Kanlaon’s summit were also measured at 1,879 tonnes per day on Wednesday, slightly above its usual average. This steady gas release suggests that the volcano’s system is pressurizing, which could trigger moderate explosive eruptions if the gas remains trapped.
Alert Level 2 remains in effect, meaning the volcano is in a state of increased unrest. PHIVOLCS warned that sudden explosions — whether steam-driven or moderately explosive — could occur anytime, producing ashfall, rockfall, or pyroclastic flows that can endanger nearby communities.
Residents are strictly prohibited from entering the 4-kilometer Permanent Danger Zone (PDZ) and are advised to stay alert within a 6-kilometer radius in case of escalation. Those living near rivers and channels around the volcano should also watch out for lahars or mudflows, especially during heavy rains.
Pilots are likewise cautioned to avoid flying close to Kanlaon’s summit, as ash emissions could pose serious risks to aircraft.
PHIVOLCS assured the public that it is closely monitoring Kanlaon Volcano and will immediately release updates if any significant changes are observed.
Oct 16, 2025
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