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Mount Pinatubo, the Philippines
Situated only 55 miles away from the capital Manila, Mount Pinatubo erupted in 1991 after more than 600 years of inactivity. The results were deadly, with over 700 people killed and 100,000 more left homeless. The smoke and ash reached heights of nearly 20 miles. Previous eruptions were relatively tame, which made this disaster all the more surprising.
