Where is mt st helens | Eruption of mt st helens
Where is mt st helens
Where is mt st helens :- Mt St Helens, Washington, United States, it is a major volcano. on May 18, 1980, Mount St. Helens is most notorious for its major eruption, the deadliest and most economically destructive volcanic event in American history.
Seventy-five people were killed by the eruption of this volcano; 250 homes, 47 bridges, 15 miles of railways, and 185 miles of highways were destroyed.
A massive avalanche of avalanche was caused by an earthquake of 5.1 magnitude, causing a lateral explosion
Which extended the mountain peak from 9,677 ft (2,950 m) to 8,363 ft (2,549 m), leaving 1 mile (1.6 km), became wide horseshoe-shaped crater.
Eruption of mt st helens
The avalanche of debris ranged up to 0.7 cubic miles (2.9 km 3) in volume. Mount St. Helens National Volcanic Monument was built to allow for the preservation of the volcano and subsequent scientific study of the eruption.
Like most other volcanoes, mt st helens is a large eruptive cone, consisting of lava rock with ash, pumice, and other deposits.
The mountain consists of layers of basalt and isite, through which several domes of dacite lava have erupted, the largest of the dacoit domes was the last crest formed, and from its northern flanks formed domes of small goat rocks, both were destroyed in the 1980 explosion.
Mount St. Helens is 34 miles (55 km) west of Mount Adams in the western part of the Cascade Range.
This volcanic mountain is about 50 miles (80 km) from Mount Rainier, the highest part of the Cascade volcanoes, Mount Hood, the closest major volcanic mountain in Oregon, is 60 miles (100 km) southeast of Mount St. Helens.