Thursday, October 18, 2007

Bulusan volcano comes back to life!

Officials on Tuesday ordered the evacuation of residents near Mount Bulusan as heavy rains triggered lahar flow from the volcano.Henry Imperial, senior science research assistant of the Philippine Institute of Volcanology and Seismology (PHIVOLCS), said barangays Cogon and Monbon in Irosin town are affected by the lahar flow.

He said the lahar was only flowing to river channels.A radio DZMM report, meanwhile, said a team of volcano experts led by Bella Tubianosa, head of PHIVOLCS-Sorsogon, has been dispatched to the area to inspect the lahar flow.PHIVOLCS said Bulusan remained restive and have shown abnormal activities in the last 24 hours.As of 3:45 p.m. Monday, PHIVOLCS said the volcano had a phreatic explosion that created an ash column that went as high as 150 meters from the crater ring.

Phreatic explosions are described as steam-blast eruptions driven by explosive expanding steam resulting from cold ground or surface water coming into contact with hot rock or magma. PHIVOLCS hoisted Alert level 1 in the area, barring residents from entering the four-kilometer permanent danger zone of the volcano.

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