The Philippine Institute of Volcanology and Seismology (PHIVOLCS) has reported that the Kanlaon Volcano in Negros island has manifested increased seismic activities, logging a total of 90 volcanic earthquakes based on latest monitoring.

In an advisory released Wednesday, PHIVOLCS said most of the tremors were generated within a depth of 20 kilometers beneath the southeastern sector of the mountain.

The tremors consisted of five -tectonic events that were produced by rock fracturing and 85 weak-low-frequencies that indicated the movement of volcanic fluids.

“In addition, volcanic sulfur dioxide (SO2) gas emission from the summit crater has been persistently elevated since the 03 June 2024 eruption, currently averaging 3,254 tonnes/day since then and reaching 5,083 tonnes/day yesterday,” the agency said.

The overall monitoring parameters indicated that magmatic activities beneath the volcano might be driving current unrest, causing increased volcanic earthquake activity, persistently high concentrations of volcanic gas emission and swelling of the volcano.