Mayon Volcano experienced multiple rockfall events on Wednesday, December 17, 2025, including one captured on camera, as state volcanologists continue to monitor signs of volcanic activity.

DOST-PHIVOLCS reported that at 9:29 a.m., lava detached or “spalled” from the summit crater, sending rocks down the Mi-isi Gully on the south-southeast upper slopes. The debris stopped within one kilometer of the summit.

Between 12 a.m. Tuesday and 12 a.m. on Wednesday, instruments recorded one volcanic earthquake and more than 10 rockfall events.

Although crater glow was not visible, sulfur dioxide emissions measured 307 tonnes per day as of December 10. A moderate plume drifted west-southwest, and ground deformation data showed that the volcano’s structure remained inflated.

Mayon remains under Alert Level 1, indicating low-level unrest. PHIVOLCS strongly reminded the public to avoid the six-kilometer Permanent Danger Zone and exercise caution within the extended danger zone. Aircraft are also prohibited from approaching the volcano.

On Tuesday, December 16, the Albay Provincial Safety and Emergency Management Office (APSEMO) held an emergency meeting with local disaster officials to assess evacuation plans, manpower readiness, and logistical support.

Officials noted that the current activity shares characteristics with signs observed before the 2023 eruption, prompting continued vigilance.

Residents and visitors are urged to follow official advisories and maintain caution to avoid risks from the volcano.