Kanlaon volcano
© GMA NewsKanlaon volcano
Kanlaon Volcano in Negros spewed ash again on Sunday afternoon. The Philippine Institute of Volcanology and Seismology (Phivolcs) said the eruption lasted for five minutes. It said the ash eruption started at 1:29 p.m. and ended at 1:34 p.m. Phivolcs said the gray ash spewed by Kanlaon was 3,281 feet.

The latest activity was accompanied by an "explosion type earthquake with rumbling sound," it added. In its bulletin on Kanlaon issued at 8 a.m., Phivolcs said it recorded six volcanic earthquakes from 8 a.m. of December 26 to 8 a.m. of December 27.

"Emission of moderate white steam plumes, 50 meters in height from the summit crater that drifted southwest, was observed," the bulletin added. Alert Level 1 remains raised over the volcano, which means it is in a period of unrest.

It said reminded concerned local government units in Negros that "entry into the 4-kilometer radius Permanent Danger Zone is strictly prohibited due to the further possibilities of sudden and hazardous steam-driven or phreatic eruptions."

It added: "Civil aviation authorities must also advise pilots to avoid flying close to the volcano's summit as airborne ash from a sudden eruption can be hazardous to aircraft."