LEGAZPI CITY: The Philippine Institute of Volcanology and Seismology (Phivolcs) is checking the ash content from the restive Bulusan volcano to check if this might lead to bigger explosion in the coming days.
Ed Laguerta, Phivolcs Bicol volcanologist chief, said they are checking the ash content of Mount Bulusan know if the latest ash eruption will lead to a magmatic eruption.
Bulusan’s last magmatic eruption took place 40 years ago.
Yesterday, Bulusan erupted at 1:10 p.m. with 200 meters of grey ash plume that drifted west-northwest. Bulusan erupted nine times this year and all have been classified as phreatic events.
Laguerta said the minor ash eruption of Bulusan volcano was recorded as an explosion-type earthquake that lasted 11 minutes on the seismic record.
Alert Level 1 remains in effect over Bulusan Volcano. This indicates that hydrothermal processes are underway beneath the volcano that may lead to more steam-driven eruptions.
The local government units and the public are reminded that entry to the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the possibility of sudden and hazardous steam-driven or phreatic eruptions.
Civil Aviation Authority of the Philippines (CAAP) on Friday advised pilots flying near Mt. Bulusan in Sorsogon to “exercise extreme caution” following the volcano’s expelling of ash.
Phivolcs for its part, reminded the public to keep out of the four-kilometer radius permanent danger zone due to possible eruptions.
It also advised people living within valleys and along river/stream channels to be vigilant against sediment-laden stream flows and lahars in the event of heavy and prolonged rainfall.