SORSOGON CITY — Bulusan Volcano in Sorsogon unleashed some fury, spewing a dark gray ash column yesterday afternoon which blew over three municipalities of the province, regional disaster officials said.
Office of the Civil Defense (OCD) Bicol Director Raffy Alejandro, who also heads the Regional Disaster Risk Reduction and Management Council (RDRRMC), said the volcano exhibited a phreatic (steam-driven) explosion at 4:54 p.m.
The ash explosion lasted for four minutes, propelling a dark gray ash column up in the sky with a height of 1.5 kilometers from the crater of Mount Bulusan.
The ash drifted northeast and fell on part of the towns Casiguran, Barcelona, and Gubat, all in this province.
Raden Dimaano, head of the Sorsogon Provincial Disaster Risk Reduction and Management Office (PDRRMO), said that as of presstime early last night, they were still conducting an assessment of the areas affected by the ash fall.
Earlier in the day, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported steaming activity in the volcano and slight inflationary changes of the edifice from May to August this year.
These observations, including ground deformation as observed in the past weeks, has placed Mt. Bulusan in Alert Level 1 (abnormal).
The local government units and the public have been reminded that entry to the four-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the possibility of sudden and hazardous steam-driven or phreatic eruptions.
These same conditions were reported recently in Mount Mayon, another active volcano in the Bicol region located in Legazpi City, Albay.
Like Mt. Bulusan, Mt. Mayon has been placed by Phivolcs in Alert Level 1.
Read more at http://www.mb.com.ph/mt-bulusans-steam-driven-explosion-causes-ash-fall-in-3-towns-of-sorsogon/#3RTEXGWdooeF0gyW.99