Impact Approximately 57 deaths‚ about $1.1 billion in property damage; caused a partial collapse of the volcano’s flank‚ deposited ash in eleven states and five Canadian provinces. With no immediate precursors‚ a magnitude 5.1 earthquake occurred and was accompanied by a rapid series of events. Mount St. Helens produces small to large explosive eruptions‚ which send varying quantities of ash and tephra into the atmosphere Tephra (rock fragments and particles ejected by a volcanic eruption
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Helens? On May 18th‚ 1980 in the state of Washington of the United States Mount St. Helens erupted sending volcanic ash‚ steam‚ water‚ and debris to a height of about 60‚000 feet. Fifty-seven people were either killed or went missing after the eruptions. Before the big eruption in 1980 there was
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Case Study of Mount St. Helens Date: 18th May‚ 1980 Time: 8:30-8:33 8: 30—ash and steam erupted. 8:32—earthquake of magnitude 5.1 on the Richter scale caused the bulge on the north side of the mountain to move forwards and downwards‚ releasing material that formed a landslide of rock‚ glacier‚ ice‚ and soil that moved downhill to fill Spirit Lake. However‚ the water only reinforced it‚ and it moved rapidly down the northern fork of the Toutle Valley. The mudflow reached
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The volcanic explosion of Mount St. Helens May 18‚ 1980 left the world in shock. For two months prior to the event small earthquakes had been recorded. On March 27‚ 1980 Mt. St. Helens had it first eruption in over 100 years. From then the volcano was erupting several times per day with nothing but steam until April 22 when its activity ceased. Prior to April 22 the earthquake had been effected by over 10‚000 small earthquakes. On May 18‚ 1980 at approximately 8:32 am the volcano truly awoke from
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First‚ we will discuss Mount St. Helens Volcano. Mount St. Helens is a stratovolcano located in the Pacific Northwest of the United States within Washington State. A stratovolcano is also known as a composite cone‚ which is “a large symmetrical structure that consists of alternating layers of explosively erupted cinders and ash interspersed with lava flows (Lutgens‚ 2012.)” Due to the cone shape of the volcano‚ stratovolcanoes are known for creating large explosive eruptions that can eject vast amounts
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1. The name of my volcano is Mount St. Helens‚ it is located in Southern Washington State. Mount St. Helens is part of the ring of fire‚ a circle of active volcanoes that surrounds the Pacific Ocean.It is one of the most beautiful mountains in the Cascade Range‚ because It is a dormant stratovolcano many people will visit to play in the snow at it’s basen. Mount St. Helens erupted on May 18‚1980‚ The blast destroyed the top of the mountain and lowered it 1‚300 feet‚ It is currently at 8‚400 feet
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pyroclastic flows travel down slope from a volcano. The Mount St. Helens pyroclastic flow spread as far as five miles north of the crater. The hot lava flows and suffocating ash falls destroying plant and animal life. The eruptions are over‚ but consequences go on. What happens to the surrounding environment after such an eruption? The Earth repairs itself from the destructive effects of the lava‚ gases and ash spewed by the eruption of Mount St. Helens. It is the short-term hazards posed by volcanoes that
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Mount St. Helens Around 8:30AM May 18‚ 1980‚ located in Southern part of Washington Mount St. Helens Erupted. Many were surprised by this eruption. Mount St‚ Helens Erupted and killed over 60 people and about 7‚000 animals. Mount St. Helens is about 40‚000 years old. There was about 250 square miles long of damage of land. It destroyed about 160 miles of highway. The eruption traveled about 300 mph and was hot at an almost 700° F (350° C). If not hundreds of thousands‚ of small animals died from
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Mount St. Helens is a volcano located in southwestern Washington. Which is 50 miles northeast of Portland‚ Oregon‚ and the Cascade Range of the Pacific Northwest. This volcano is a composite volcano. The volcano Mount St. Helens is also known as a strato volcano. It is constructed by alternating layers of lava‚ ash‚ and other volcanic debris. They also tend to erupt explosively and pose considerable danger to nearby life and property. In the year 1980 there was an eruption. Before the time
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several active Mountains all over the world and they all have stories behind them. One of these active mountains of interest is the Mount Saint Helens. This Mountain got its name from a British diplomat known as Lord Saint Helens and is located in the Skamania Country in Washington State formed in the northern region of the United States of America. Mount Saint Helens is known to be one of the top 10 most famous volcanoes in the world due to the deadly pyroclastic flows and ash explosions well known to
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