Mayon volcano spewed thick plumes of ash and lava anew.
It occured at past 12 noon today.
A pyroclastic flow is being seen at the south side of the volcano.
Legazpi City and Camalig town are located in this area.
Alert level four, the second highest alert level, remains hoisted over Mayon.
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) says, a hazardous eruption is still possible.
A rush of silted water flowed down the foot of Mayon last Saturday.
This was triggered by heavy downpours brought by a tail-end of a cold front that prevailed in Luzon.
The number of residents who fled their homes due to Mayon's restiveness has increased to at least 80,000.
Problems on sanitation and food shortage have been plaguing the evacuees.
Many of them have been staying in public schools converted into temporary shelters for about two weeks.