LEGAZPI CITY, June 20 (PNA) -- Mt. Bulusan calmed down anew after a seven-minute steam-driven ash explosion at 1:03 p.m. Sunday, the Philippine Institute of Volcanology and Seismology said Monday.
Resident volcanologist Crispolo Deolata said the Philvolcs recorded two quakes during the past 24-hour observation period.
Aside from this, the tip of the volcano is no longer visible due to the clouds covering it. It is also drizzling now in Sorsogon province.
Deolata said Sunday's blast was mild and the ash spewed reached 300 meters high. This is far different from the June 10 phreatic explosion that spewed ash as high as two kilometers.
The ash fell on the surrounding villages and almost 8,000 residents were affected.
While this Sunday's event registered only two quakes, the Phivolcs recorded more than 100 jolts on June 10.
Despite the relative hush, Deolata warned against any human activity or entry into the four-kilometer radius permanent danger zone.
He said the volcano still poses danger to residents as a phreatic explosion may occur anytime while alert level one is raised.
The Phivolcs official also warned of possible lahar flows once rains continue pouring as these would certainly bring down old and new deposits.
To be affected are barangays Cogon and Patag in Irosin and Barangay Aniog in Juban.
Deolata said the most common targets of ash fall are barangays Inlagadian and Mabini in Casiguran, and Puting Sapa and Aniog in Juban town.
He said there are still no evacuees in Sorsogon and that the Phivolcs continuously coordinates with the Sorsogon Provincial Disaster Risk Reduction and Management Office. (PNA) JMC/FGS/NIM/CBD/EBP