When was the eruption of Mount St. Helens?
In the morning of May 18, 1980, Mount Saint Helens was the fifth highest mountain in the state of Washington. Then it erupted. It became a fierce, active volcano, and it blew 1,300 feet of its top right into the air. In the morning, it was 9,677 miles high, and by midnight it was only 8,375 feet high. One-eighth of the entire mo