Résultats pour "Eruption" dans Sciences exactes

For months in early 1980, scientists, journalists, and ordinary people listened anxiously to rumblings in the long quiescent volcano Mount St. Helens. Still, when a massive explosion took the top off the mountain, no one was prepared. Fifty-seven people died, including newlywed logger John Killian (for years afterward, his father searched for him in the ash), scientist Dave Johnston, and celebrated local curmudgeon Harry Truman. The lives of many others were forever changed.

In 1980, the United States suffered the deadliest and most destructive volcanic eruption in its history when Mount St. Helens literally blew its lid off, the result of seismic activity during the eruption. What made the eruption all the more remarkable was that a fair amount of preparations had gone into anticipating it, after an earthquake in the area a few months earlier alerted federal geologists to the possibility of activity there. In fact, Mount St. Helens had been the cause of the earthquake itself, the result of its own lava flows under the surface.