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13 lut 2019 · Pyroclastic flows known as lahars easily overran the slopes of Pinatubo, engulfing gullies as deep as 200 meters. The Aeta tribes that lived on the slopes lost their entire world. The mountain and centuries-old forests they knew were wiped out and replaced by a barren and unfriendly place.
Lahars form when water from intense rainfall, melting snow and ice, or the sudden failure of a natural dam, mixes with this loose volcanic material, creating mudflows that can be particularly dangerous and destructive.
A lahar (/ ˈ l ɑː h ɑːr /, from Javanese: ꦮ꧀ꦭꦲꦂ) is a violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water. The material flows down from a volcano , typically along a river valley .
7 gru 2021 · Lahars are rapid flows composed of water and volcaniclastic sediments, which have the potential to impact residential buildings and critical infrastructure as well as to disrupt critical services, especially in the absence of hazard-based land-use planning.
1 sty 1996 · Lahars at Pinatubo are initiated in a variety of ways. Primary, hot flows are triggered by rain with threshold values of 0.21-0.24 mm/min sustained over periods >30 minutes. Others result from...
4 paź 1994 · The Philippine Institute Of Volcanology And Seismology (PHIVOLCS) reports that up to ten feet high lahar flowed down the Pasig-Potrero river in Pampanga causing the breaching of many dikes.
28 kwi 2019 · Rappler.com. Rappler speaks to Mahar Lagmay, UP Resilience Institute Executive Director, on the impact of the earthquake in Pampanga and the factors that led to it. MANILA, Philippines – On...
