Around six volcanic earthquakes and two rockfall incidents were detected at Mayon volcano within 24 hours. Philippine Institute for Volcanology and Seismology (Phivolcs) said Friday that two of the quakes were linked to the “phreatic” or steam-driven ash eruptions yesterday at 8:11 a.m. Thursday following 6:27 a.m. Friday.
Volcanic occurences produced grayish ash plumes as high as 500 meters and 300 meters. Phivolcs stated mild emissions of white steam-laden plumes were also observed, along with a crater glow at Mayon’s summit at night.
Phivolcs added Mayon lingers on Alert Level 2 as decribed, “moderate level of unrest.” The agency advised the public to withhold coming near the volcano as it may display abrupt explosions, lava collapse, and ash fall.
They held the public are prohibited from the six kilometer-radius permanent danger zone and the seven kilometer-radius of the extended danger zone, which stretches from Barangay Anoling, Camalig to Sta. Misericordia, Sto. Domingo in Albay province.
Phivolcs further recommended the civil aviation authorities to make sure pilots avoid routes to the summit as volcanic ash and fragments are harmful to aircraft and its equipment.