PANOORIN: Pagbuga ng abo at usok ng Bulkang Mayon, alas-8:50 ng umaga | Kuha ni Mike Mabugnon, @philredcross pic.twitter.com/N1fJOv95Qh

— DZMM TeleRadyo (@DZMMTeleRadyo) January 23, 2018

MANILA - (UPDATE) Mayon Volcano spewed ash for the second time in as many days on Tuesday, as tens of thousands of residents were evacuated ahead of possible hazardous eruption.

Rumbling sounds echoed as a thick pillar of smoke and ash billowed from the mouth of the volcano, after it spewed lava overnight.

"'Yung tinatapon na bato ng lava fountain, pag tumama siya sa lupa 'yun 'yung naririnig niyong parang rumbling sound, parang kulog," the Philippine Institute of Volcanology and Seismology (Phivolcs) said in a press conference.

This morning's eruption activity is weaker, noted Phivolcs, as Monday's sporadic explosions already spewed out large volumes of lava. However, Mayon remains swollen and it may release more materials.

Data gathered by Phivolcs show that there are no indications yet of a violent eruption similar to the ones in 1814 and 1987 where hundreds died. Volcanologists, however, are not discounting this possibility.

"Ang tinitingan namin kasi is 'yung pinapakita for the moment. And for the moment walang pinapakita ang Mayon na we are heading towards that one pero hindi rin natin inaalis yung possibility," Phivolcs explained.

At least 40,000 residents have been evacuated in nearby towns. after the second highest alert in a five-step warning system was raised over Mayon on Monday, which means hazardous eruption is imminent.

Local authorities are preparing for possible preemptive evacuation in towns in the outskirts of the 8-kilometer danger zone in preparation for a possible big explosion.