Phivolcs raises Kanlaon Volcano alert to Level 3 due to seismic activity

The Philippine Institute of Volcanology and Seismology (Phivolcs) reported an increase in seismic activity at Kanlaon Volcano on Monday.

Seventy-two volcanic earthquakes were recorded from 12 a.m. to 12 p.m., with magnitudes ranging from 0.3 to 3.1, indicating progressive rock fracturing beneath the volcano.

Phivolcs noted that since May 11, there have been 135 volcanic earthquakes, including relatively strong volcano-tectonic (VT) events, which suggest rising magma or magmatic gas driving a path towards the surface.

Sulfur dioxide (SO2) emissions measured at 554 tons on May 11, showing a decline from previous levels but still indicating potential pressurization and swelling of the edifice.

Phivolcs advised local government units to prepare for possible evacuation within the 6-kilometer danger zone due to the volcano being under Alert Level 3, which signifies increased chances of moderately explosive eruptions.

The agency also warned communities near Kanlaon Volcano to stay vigilant against potential lahars and sediment-laden streamflows during intense rains, especially if unrest escalates further.