Thirty years ago, on May 18, 1980, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain's summit, and claimed 57 human lives. This short video shows the catastrophic eruption - and the amazing recovery of the surrounding ecosystem - through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years. See the images and read more, visit NASA's "World of Change" site: http://earthobservatory.nasa.gov/Features/WorldOfChange/sthelens.php Like our videos? Subscribe to NASA's Goddard Shorts HD podcast: http://svs.gsfc.nasa.gov/vis/iTunes/f0004_index.html Or find NASA Goddard Space Flight Center on facebook: http://www.facebook.com/nasa.gsfc Or find us on Twitter: http://twitter.com/NASAGoddard
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