Kanlaon Volcano that was again rocked by 104 volcano-tectonic earthquakes on its western flanks in the past 24 hours remains at Alert Level 1, the Philippine Institute of Volcanology and Seismology reported yesterday.
Zephard Caelian, Negros Occidental Provincial Disaster Management Program Division head, said that while the alert level at Kanlaon has not been raised and there is no need to panic, they continue to closely monitor the situation and remain prepared.
"We cannot be complacent, this is an active volcano and we must live with that hazard. We must be prepared always," he said, pointing out that the possibility of an eruption remains.
Caelian said he met with officials of La Carlota City, Bago City and La Castellana town and talked with their mayors to review their contingency plans.
Among the matters reviewed were exit routes in case of an evacuation, resources and evacuation centers, he said.
They are also intensifying their campaign to remind residents what to do during eruption, he said.
"We should not lower our guard…we should pray, be prepared and be pro-active," he said.
Phivolcs said a magnitude 3 earthquake was recorded 12 kilometers north 22 degrees west of Silay City in Negros Occidental at 1:25 a.m. yesterday.
Activity at the Kanlaon vent consisted of weak emission of white steam-laden plumes that rose 300 meters before drifting northwest and southeast, it said.
Sulfur dioxide (SO2) emission was measured at an average of 438 tons a day as of Saturday, it added.
Ground deformation data from continuous GPS measurements indicate a slight deflation of the lower and mid slopes since January, Phivolcs said.
Short-term electronic tilt monitoring on the southeastern flanks recorded continuing deflation on the lower slopes and inflation on the mid slopes since April. These parameters indicate that hydrothermal or magmatic activity is occurring beneath the edifice, Phivolcs said.
Phivolcs reminded the public that Kanlaon Volcano is at Alert Level 1 which means that it is at an abnormal condition and has entered a period of unrest.
The local government units and the public are strongly reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) must be strictly prohibited due to the further possibilities of sudden and hazardous steam-driven or phreatic eruptions, it said.
Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ejecta from any sudden phreatic eruption can be hazardous to aircraft, it added.
Phivolcs said it is closely monitoring Kanlaon Volcano’s activity and any new development will be relayed to all concerned.*
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