(Updated 9 a.m.) A steam-driven explosion – accompanied by a rumbling
sound heard several kilometers away and 10 volcanic quakes – was observed at
Bulusan Volcano in Sorsogon before dawn Friday, but this was not enough basis
for state volcanologists to raise the alert level there.
Philippine Institute of Volcanology and Seismology (Phivolcs) director Renato Solidum Jr. said the explosion was more due to rainwater from tropical storm “Bebeng” (Aere).But he stressed the explosion at about 12:25
a.m. was relatively weak.
Solidum also said the alert status at Bulusan remains at “1,” where entry to the
4-km radius Permanent Danger Zone (PDZ) is strictly prohibited, since the area
is at risk to sudden steam and ash explosions.
Solidum noted the last
explosion from Bulusan was last Feb. 21.
Asked if there was a need to
raise the alert level, he said, “wala (none).”
A later update from
Phivolcs indicated the explosion was not observed due to cloud cover, but was
accompanied by a rumbling sound “heard up to five km away from the
“This event was recorded as an explosion-type earthquake
lasting for about 10 minutes,” it added.
Meanwhile, Phivolcs said at least 10 volcanic
earthquakes were observed at Bulusan in the last 24 hours.