PHIVOLCS reported that during 27 November-4 December white steam plumes rose from Mayon daily, and crater incandescence was visible almost nightly.
At 0533 on 27 November a phreatic event generated a grayish-white ash plume that rose 300-500 m and drifted SW.
A one-minute-long event that began at 0941 on 30 November produced another grayish-white ash plume.
The Alert Level remained at 2 (on a 0-5 scale) and PHIVOLCS reminded residents to stay away from the 6-km-radius Permanent Danger Zone and the 7-km Extended Danger Zone on the SSW and ENE flanks.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)