Heavy rainfall triggers Mount Bulusan lahar flow
Mount Bulusan (Image sourced from the Sorsogon Public Information Office / Facebook / Phivolcs)
LEGAZPI CITY — The Philippine Institute of Seismology and Volcanology (Phivolcs) on Monday said rain-triggered lahar flow occurred on the southwestern slopes of Mount Bulusan in Irosin, Sorsogon.
In an advisory issued at 1 a.m., Phivolcs said a small-volume lahar that began at 7:04 p.m. on Sunday was detected by seismic and infrasound stations of the Bulusan Volcano Network along Calang Creek in Barangay Cogon.
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The event lasted for 54 minutes during a period of thunderstorm in the province, Phivolcs said.
On Sunday night, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) in Southern Luzon issued a thunderstorm advisory in six provinces of the Bicol region.
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Pagasa said moderate to heavy rain with lightning and strong winds were experienced in the region.
Phivolcs recorded phreatic eruptions on June 5 and June 12 that covered several villages in Sorsogon with ash.
The agency warned local officials and residents near the channels of another lahar and sediment-laden stream flows that could be triggered by heavy rainfall.
The volcano is still inflated and remains under Alert Level 1.
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