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: http://zebu.uoregon.edu/2002/ph123/sth/index.html
Дата изменения: Wed Feb 27 22:15:43 2002
Дата индексирования: Tue Oct 2 09:23:33 2012
Кодировка:
Mount Saint Helens, a volcano in the Cascade Range of southwestern
Washington that had been dormant since 1857, began to show signs of
renewed activity in early 1980. On 18 May 1980, it erupted with such
violence that the top of the mountain was blown off, spewing a cloud
of ash and gases that rose to an altitude of 19 kilometers. The blast
killed about 60 people and destroyed all life in an area of some 180
square kilometers (some 70 square miles), while a much larger area
was covered with ash and debris. It continues to spit forth ash and
steam intermittently. As a result of the eruption, the mountain's
elevation decreased from 2,950 meters to 2,549 meters.