The Philippine Institute of Volcanology and Seismology (Phivolcs) warned on Wednesday June 2 that volcanic sediment flows or lahars could occur in the waterways around the Taal and Pinatubo volcanoes due to tropical storm “Dante”.
Citing a violent weather report, Phivolcs said Dante is expected to make landfall over Batangas province around 5 p.m. on Wednesday and pass through western and central Luzon over the next two days.
“Due to its trajectory and potentially significant precipitation, Dante can be expected to generate volcanic sediment streams or lahars, muddy runoff or muddy runoff in rivers and drainage areas on active volcanoes. monitored from Taal and Pinatubo, âPhivolcs said in a notice.
The agency said prolonged and intense rainfall could generate eruption-free lahars over major rivers draining Pinatubo Volcano, where significant erodable pyroclastic deposits from the 1991 eruption remain over the watershed.
âPinatubo lahars will likely be confined to the channel and perform in the upper and middle reaches of the Sto. The Tomas-Marella and Bucao river systems, but can shift to muddy streams and flooding on the lower reaches and affect the adjacent communities of San Marcelino, San Narciso, San Felipe and Botolan, province of Zambales â, a he declared.
“Muddy runoff can also be generated along the O’Donnell and Pasig-Potrero river systems draining the Pinatubo edifice to the north and southeast, respectively, and affect downstream communities in the provinces of Tarlac and Pampanga,” he added.
Additionally, Phivolcs said continued heavy rains can also lead to muddy flow and muddy runoff around Taal Volcano, “particularly on the slopes west of Taal Lake where the thin tailings can be re-mobilized into streams. and the roads and on the slopes to the lake “.
“In particular, muddy runoff and runoff may reoccur in the previously affected communities of Agoncillo and Laurel, in Batangas province,” the agency said.
Phivolcs urged communities and local government units in areas surrounding the two active volcanoes to continuously monitor weather conditions and take preventative measures for their safety.
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