Mount St Helens
volcano,st. helens,
At 8:32 Sunday Morning, May 18, 1980, Mount St. Helens Erupted
Before May 18, 1980, Mount St. Helens' peak stood at 2,950 m (9,677 ft). The peak rose more than 1,525 m (5,000 ft) above its base. On May 18, 1980, the eruption eliminated 2.6 billion cubic meters (3.4 billion cubic yards or 0.63 cubic mile) of its cone (about 400 m or 1,300 ft in height), leaving behind a horseshoe-shaped crater (open to the north), with the highest part of the crater rim on the southwestern side being at 2,550 m (8,365 ft) elevation.
During the 9 hours of vigorous eruptive activity, about 540 million tons of ash were sent into the sky. Total estimated volume of the ash before its compaction by rainfall was about 1.25 cubic kilometers (0.3 cubic mile), equivalent to a football field piled about 150 miles high with fluffy ash.
By early May 19, fine ash was detected by systems used to monitor air pollution in several cities of the northeastern United States. Some of the ash drifted around the globe within about 2 weeks.
Category: Y Yodio Experiences
Located in Mount St. Helens 8,365 feet
Tracks:
- Yodio Track 1