This is part of the time-lapse footage of the ash emission from the crater of the Kanlaon Volcano in the first week of December. (Screenshot from the record of Kanlaon Volcano Observatory – VKMN IP Camera via Phivolcs/Facebook)
MANILA, Philippines – Kanlaon Volcano’s alert level was raised to 3 (magmatic unrest) on Monday, and the Philippine Institute of Volcanology and Seismology (Phivolcs) warned it could generate lahar.
“Precautionary measures should be in place because if when there’s rainfall, our concern is that the volcano would generate lahar,” Phivolcs Deputy Director Mylene Villegas said in a press conference.
READ: Kanlaon Volcano erupts; alert level 3 up
“They (public) should always be ready and follow instructions of their LGUs (local government units),” said Phivolcs Director Teresito Bacolcol.
An explosive eruption occurred at the summit vent of Kanlaon Volcano at 3:03 p.m., resulting in a voluminous plume that rose 3 km. high.
The eruption lasted for 3 minutes and 55 seconds, and there was no precursory seismicity before the eruption.
Villegas said similar short-lived eruptions may occur in the short period within the 6-km radius area on the summit.
Phivolcs, thereby advised that evacuation of the 6 km. radius should be mandatory.
There were ashfall reports in Bago City, as well as in barangay Murcia and La Carlota City, all in Negros Occidental.
Pyroclastic density currents (PDCs), which Villegas described as the most dangerous volcanic hazard, descended the slopes on the general southeastern edifice. The PDC descended towards the municipality of La Castellana, also in Negros Occidental.
Meanwhile, sulfur dioxide emissions on Monday averaged 4,638 tons. The last recorded high emission in Kanlaon was 11,556 tons last Sept. 11.
Aviation authorities are advised to warn pilots to avoid flying close to the Kanlaon summit.