The Philippine Institute of Volcanology and Seismology (Phivolcs) on Monday, May 24, said six volcanic earthquakes were detected during the 24-hour observation period of Kanlaon Volcano in Negros Island.
Likewise, voluminous emission of white steam-laden plumes that rose one kilometer before drifting southeast, southwest, and northwest was observed.
Science and Technology Undersecretary and Phivolcs OIC Renato Solidum said "hot gas heats up the groundwater that produces the steam."
But what is happening in Kanlaon is "not exactly the same" as that in Taal Volcano, he added.
Solidum said the source of gas causing the steaming activity at Kanlaon is "still deep-seated" while it was magma coming from a shallow depth at Taal Volcano.
Phivolcs said the SO2 emission at Kanlaon was measured at an average of 1,030 tonnes per day on Sunday.
It also noted that ground deformation data from continuous GPS and electronic tilt measurements have been recording slight inflation of the lower and middle slopes since June 2020.
"These parameters may indicate hydrothermal, tectonic, or deep-seated magmatic processes occurring deep beneath the edifice," it said.
Phivolcs reiterated that Mt. Kanlaon is still under Alert Level 1, which means that it is in abnormal condition and period of unrest.