Mayon Volcano in Albay had no volcanic earthquake for second straight day but its rockfall events and lava flow relentlessly continue, the state seismologist said in its latest 24-hour monitoring released on Friday.

The Philippine Institute of Volcanology and Seismology (Phivolcs) said it recorded a total of 399 rockfall events and 13 dome-collapse pyroclastic density currents (PDC) lasting for 1 to 4 minutes long.

The Mayon Volcano summit crater’s continuous moderate degassing produced steam-laden plumes that reached 750 meters before it drifted southwest and west-southwest.

Phivolcs said Mayon emitted sulfur dioxide which averaged 706 tonnes per day.

The country’s active volcano still exhibits very slow effusion of lava flow which reached Mi-si and Bonga gullies, within 2,500 meters and 1,800 meters, respectively.

“[W]hile collapse debris have deposited to three thousand three hundred (3300) meters from the crater,” Phivolcs said.

The Mayon’s edifice remains inflated, especially on the northwest and southeast.

“Alert Level 3 is maintained over Mayon Volcano, which means that it is currently in a relatively high level of unrest as magma is at the crater and hazardous eruption within weeks or even days is possible,” the state seismologist noted.

WATCH: Closeup shot of boulders and fragments of glowing rocks cascade down from the crater of Mayon. (Video courtesy: Jethro Calag Photography)