The June 12, 1991, eruption of Mt. Pinatubo was rated a VEI 6--10 times larger than the Mt. St. Helens eruption in 1980--and sent a giant ash cloud more than 100,000 feet in the air. Typhoon Yunya also struck the country the same day, and the mix of rain and ash caused major avalanches of mud, rock and water--and roof collapses that led to more than 300 deaths. Pinatubo is on the island of Luzon.
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