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Volcanic Advisory

Kanlaon Volcano’s seismic monitoring network two (2) volcanic earthquakes during the 24-hour observation period. Sulfur dioxide (SO2) emission was measured at an average of 67 tonnes/day on 19 March 2020. Ground deformation data from continuous GPS measurements indicate a period of long-term slow inflation of the edifice since 2017, while short-term electronic tilt monitoring on the southeastern flanks recorded slow inflation of the lower slopes since May 2019 and pronounced inflation of the upper slopes at the end of January 2020. These parameters indicate that hydrothermal or magmatic activity is occurring deep beneath the edifice.

Alert Level 1 (abnormal) status prevails over Kanlaon Volcano, 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. 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. DOST-PHIVOLCS is closely monitoring Kanlaon Volcano’s activity and any new development will be relayed to all concerned.