Fifty volcanic earthquakes were recorded in the Bulusan Volcano according to the latest bulletin issued by Phivolcs Saturday, 24 May. 

The volcano, located in the province of Sorsogon in the Bicol Region, also emitted 438 tons of sulfur dioxide on Friday and released voluminous plumes reaching 100 meters tall before drifting west-southwest and west-northwest. 

The volcano’s edifice remains inflated, indicating an accumulation of magma or volcanic glasses. 

Phivolcs warned citizens in the area that sudden steam-driven or phreatic eruptions may occur. A phreatic eruption occurs when water comes into contact with hot volcanic materials such as rocks or gases, which, in turn, produces steam, ash, and fragmented volcanic materials. 

Entry into the four-kilometer radius Permanent Danger Zone, entry without vigilance into the Extended Danger Zone, and flying any aircraft close to the volcano remains prohibited. 

Bulusan last erupted on 28 April, with activity lasting approximately 24 minutes prompting Alert Level 1 to be raised, indicating low-level volcanic unrest.