MANILA, Philippines — The Civil Aviation Authority of the Philippines (CAAP) on Saturday extended its Notice to Airmen (NOTAM) by another day due to Mayon Volcano's increasing unrest. Quoting the Department of Science and Technology - Philippine Institute of Volcanology and Seismology (DOST-Phivolcs), the aviation regulator said the current activity was driven by shallow magmatic processes that may cause sudden phreatic eruptions and could potentially precede hazardous magmatic eruptions. The volcano's present alert level is 2, which means aircraft are prohibited from operating within 11,000 feet of the summit and pilots are strongly advised to avoid the area, as sudden phreatic eruptions may produce ash that poses risks to flight safety. CAAP said it continued to monitor the situation closely with relevant agencies and reminded all aircraft operators to remain vigilant. The volcano remains under Alert Level 2, which was raised on Jan. 1, 2026, following a sharp increase in rockfall events and edifice inflation. The CAAP operates seven airports in the Bicol Region: Bulan Airport, Sorsogon Airport, Daet Airport, Masbate Airport, Naga Airport, Virac Airport, and Bicol International Airport.