By Alec Go
The Philippine Institute of Volcanology and Seismology (Phivolcs) said it recorded Mayon Volcano’s biggest pyroclastic flow since June 8 on the night of June 15, along with 307 rockfall events and four volcanic earthquakes on the said day.
Thirteen dome-collapse pyroclastic density currents (PDC) were recorded with the largest taking place at 11:18 p.m. The PDCs lasted for two to six minutes.
“Traces of ashfall dispersed from the PDCs were reported in Sitio Buga, Brgy. Nabonton, City of Ligao and Purok 7, Brgy. San Francisco, Municipality of Guinobatan,” the Phivolcs noted.
Very slow effusion of lava from the summit crater also remained.
“The lava flows have advanced to approximately one kilometer from the summit crater while collapse debris have deposited to two kilometers from the crater,” Phivolcs reported.
Plume emission rose 750-meter high while average sulfur dioxide emission was 826 tonnes on June 15.
Entry into the six-kilometer permanent danger zone and flying close to the volcano remains prohibited.
Mayon Volcano remains under Alert Level 3 (high level of unrest) with a tendency of hazardous eruption within days or weeks.
