MANILA, Philippines - Mayon Volcano's activity has continued to calm down after its alert level was lowered from 4 to 3, the Philippine Institute of Volcanology and Seismology (Phivolcs) said Wednesday.
Phivolcs' 7 a.m. bulletin said its volcanologists detected only 4 volcanic earthquakes and 21 rockfall events since Tuesday.
It added that pale crater glow was also observed Tuesday night and the volcano's sulfur dioxide emission has decreased to an average of 1,914 tons per day.
"Emission of moderate volume of white steam was observed at the summit crater during cloud breaks yesterday," the Phivolcs bulletin added.
Alert Level 3 remains hoisted over the volcano, which means residents should continue to avoid reentering the 6-kilometer permanent dangerous zone. It added that the 7-kilometer extended danger zone on the southeast flank of the volcano should also be "free from human activity."
More than 2,000 families, whose houses are located inside the 6-kilometer permanent danger zone, remained in evacuation centers. The provincial government has already brought back more than 7,000 families to the extended danger zones since the lowering of the alert level around the volcano.