"Lahar and boulders came down the mountain. There was some panic among the residents. Cars cannot pass through here in Monbon Bliss (in Monbon village). The highway has been affected, vehicles cannot move," local news network GMA-TV quoted Crispulo Diolata Jr, science research assistant of the Philippine Institute of Volcanology and Seismology (Phivolcs), as saying.
Crispulo said as Bulusan volcano did not explode or spurn out ashes on Monday night, what fell from the volcano were ash deposits and boulders.
Resident volcanologist Bella Tobianosa said 54 millimeters of rain was recorded at the region on Monday night. Aside from Monbon, she said the volcanic mud and debris flow also affected four villages in neighboring Irosin, a small town with a population of 45,507, GMA-TV said.
Earlier this month, Phivolcs warned residents near Bulusan volcano to watch out for possible mud flows after ash explosions recorded as early as October 4.