MANILA, Philippines – Sorsogon’s Bulusan Volcano remains under Alert Level 0, but state volcanologists warned that “there are increased chances of steam-driven or phreatic eruptions occurring at the crater or summit area.”
The Philippine Institute of Volcanology and Seismology said in an advisory on Thursday, September 21, that it has recorded 22 volcano-tectonic earthquakes since 5 am of Wednesday, September 20. The strongest earthquakes ranged from magnitude 0.1 to 1.5 and “originated between 1 [and] 5 kilometers beneath the southern sector of Bulusan Volcano,” added Phivolcs.But sulfur dioxide emission only averaged 100 tons per day on Thursday, “well within baseline levels.”Phivolcs reminded the public not to enter the 4-kilometer-radius permanent danger zone surrounding the volcano, due to the risk of phreatic eruptions, rockfalls, and landslides.