火山分布在世界各地，活火山的喷发，不时的给人们的生活添加点调料，火山喷发时形状犹如蘑菇，美丽、震撼，不知道大家有没亲眼见到过火山喷发的，呵呵！
Alaska's Redoubt Volcano, which last erupted in 2009 (pictures), presents a high risk because of its proximity to the city of Anchorage, its international airport, and the flight paths overhead.
Pictured on April 21, 1990, erupting Redoubt Volcano in 1989-90 sparked volcanic mudflows, or lahars, which swept into an inlet some 13.5 miles (35 kilometers) away.
Ash from the volcano temporarily shut down a 747's engines in December 1989. Though the crew restarted the engines in midair, the incident's aftershocks can still be felt in recent on-again, off-again airport shutdowns related to Icelandic volcanic ash.
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