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| In the years since the 15 June 1991 eruption of Mount Pinatubo in the Philippines, sediment carried by rain-induced lahars have displaced more than 50,000 people from their homes and covered at least 400 km2 of rich agricultural land. This view of the Abacan River shows sediment deposited on farmland and a nearby community within 2 months of Pinatubo's explosive eruption. Nearly all the post-eruption lahars have been caused by intense rainfall, especially during typhoons and monsoon season, which easily erodes the loose pyroclastic-flow deposits that fill the headwaters of all rivers draining the volcano. |
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