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Lahar from the slopes of Bulusan volcano
« on: November 17, 2010, 05:35:46 PM »
Intermittent rains caused lahar from the slopes of Bulusan volcano to flow into a river along Barangay Patag and another in Gulang-Gulang, both in Irosin town, and the Rangas river in Juban town.

The rivers, which turned grayish due to volcanic sand, ash and similar tiny debris, had lahar which was a combination of rainwater with less than 60 percent sediment, said Phivolcs Resident Volcanologist Ed Laguerta in an interview at the Bulusan Observatory in Sorsogon City.

But Laguerta explained that a 60 percent sediment content of lahar is not very dangerous, compared to an 80 percent content that is very thick and, thereby, poses greater hazards.

Besides, Laguerta assured that lahar flows were still confined in channel and can only pose greater harm should there be heavy and continuous rainfall and once channels get heavily silted. (PNA)

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