LEGAZPI CITY -- Mount Mayon remains under alert level one as the volcano continues to show "abnormal conditions", the Philippine Institutute of Volcanology and Seismology (Phivolcs) said Saturday.
The Phivolcs was quick to clarify that "presently, no magmatic eruption is imminent", but warned the public against entering the six-kilometer radius Permanent Danger Zone (PDZ) around the volcano due to possible rockfalls, landslides, sudden ash puffs, and steam-driven or phreatic eruptions from the summit.
The volcano has been under alert level 1 since Thursday morning as "sulfur dioxide emission has raised beyond the baseline level of 500 tons per day."
Geologists and disaster officials earlier conducted an aerial survey of the volcano and noted that there were no significant changes in the crate dome. They also did not see a crater glow.
Phivolcs' ground deformation survey found a deformation on the edifice of the Mayon Volcano, possibly indicating magma beneath the surface.
Should there be an ash explosion, authorities expect places in the southeast quadrant of the volcano, including Legazpi City and the towns of Daraga and Santo Domingo, to be affected.
Authorities are asking the public to stay alert, heed the advice of the government, and do not steal or tamper with the monitoring equipment placed along the Mayon's slopes.