LEGAZPI CITY, Nov. 17 -- 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.