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An essay on volcanic eruption
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Understanding Volcanoes
The Earth has a long history of volcanic activity. Currently, there are approximately 1,500 active volcanoes worldwide (USGS, 2014). Whether erupting on the Earth’s surface or deep in the ocean, volcanic activity can result in devastating natural disasters. A thorough background regarding volcanoes and their formation mechanisms, historical data, and damaging impact from previous eruptions is needed in order to understand the complicated science behind volcanoes.
Background
Formation
Volcanoes vary in shape, size, and type. Likewise, volcanoes have varied eruption styles, from beautiful fiery displays of explosive lava to pyroclastic flows of hot gases and ash. A volcano is an opening in the Earth’s surface where magma has erupted or poured through, generally resulting in hills or mountains (Abbott, 2014). This natural phenomenon has spawned a field of science known as volcanology. Volcanology is a branch of geological science that studies volcanoes, lava, and magma (RedOrbit.com, 2015). By studying volcanoes, volcanologists gain a better understanding of how volcanoes form and erupt. Generally, volcanoes form at tectonic plate
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The magnitude of pyroclastic surges and flows literally annihilated everything it touched. As a result of the eruption, approximately 13,000 to 16,000 people died, countless animals perished, houses and temples were destroyed, and all vegetation was decimated. The eruption also impacted the mountain itself. Due to the eruption, the magma chamber collapsed under the weight of Vesuvius causing the summit to sink into the magma chamber and form a caldera (Dutch, 2009). Additionally, the environment was affect by the eruption. The ash spewed from Vesuvius reached as far away as Constantinople and Greenland. The impact and magnitude of this massive eruption was felt throughout the region as well as neighboring
Many of us know Mount Shasta to be a beautiful mountain and a popular tourist location in California. However, this mountain is much more than that, this mountain is actually a volcano. Volcanoes come with a number of hazards and a volcano of this size is of no exception. Previous eruptions on Mount Shasta have given us an idea of the power this volcano has and the damage it may do. With this information scientists are able to predict what may happen should another explosion occur.
On the afternoon of 24th August 79 AD, a volcano called Mt. Vesuvius erupted, which resulted in destroyed lives of citizens, it was estimated that there were 10 to 12 thousand people who occupied the city .The cities of Pompeii, Herculaneum and a few others were severely affected by the eruption. The cities are well known for its beautiful landscapes and its temperate climate.Pompeii is based in the south, close to Naples in the region of Campania in Italy.The eruption started a series of events such as pumice,rocks and ashes falling down and caused hot volcanic gases to rise high in the sky, people from around 100 miles away could see the event unfolding.The remains of Pompeii and other cities was frozen in time due to the pyroclastic surges
Helens tallied up to be the most deadly and destructive eruption the United States had ever seen. “Approximately fifty-seven people were killed directly from the blast and 200 houses, 47 bridges, 15 miles (24 km) of railways and 185 miles (298 km) of highway were destroyed; two people were killed indirectly in accidents that resulted from poor visibility, and two more suffered fatal heart attacks from shoveling ash (Wikipedia 3)”. Just when it seemed the nightmare was over a second eruption occurred the following day. A quarter of the lava was fresh, and included ash, pumice, and volcanic bombs, and the rest was older molten rock. “The removal of the north side of the mountain (13% of the cone 's volume) reduced Mount St. Helens ' height by about 1,280 feet (390 m) and left a crater 1 to 2 miles (2 to 3 km) wide and 2,100 feet (640 m) deep with its north end open in a huge breach (Wikipedia 3)”. The downwind of the eruption also destroyed many agricultural crops such as wheat, apples, potatoes, and alfalfa. Overall Mount St. Helens was a major blow that cost the US 1.1 billion dollars, and struck fear into the hearts of all of America on May 18th,
Volcanoes are one of the most disastrous yet captivating geological land forms on earth. Many volcanic eruptions are catastrophic, but not all volcanic eruptions are as brutal. The two case studies I have chosen to compare and contrast are the 1980 Mount St. Helens eruption with the eruption of Hawaii’s Kilauea volcano which is still active today.
The eruption on Mount Saint Helens has a specific cause and comes with many effects. A multifold of people would say that the “mountain looked like the site of an atomic blast” (Bredeson 30). That is a very accurate depiction as it took great power to inflict as much damage as it did. The reason for this impressive amount of force is that when magma is built up with pressure and an earthquake hits, the pressure gets magnified and the volcano explodes (Lewis). This is exactly what happened inside Mount Saint Helens. Furthermore, it has been revealed that “The earthquake that triggered the explosion was a 5.2 on the Richter scale” (Gunn 559). The earthquake to the magma can be compared as a match to gasoline. Even though the earthquake was not huge, the scale of the eruption was much greater than that of the earthquake (Gunn 560). The earthquake was only the trigger that allowed for more devastating things to occur. Thirteen hundred feet of the volcano were lost in the explosion followed by landslides, mudslides, and lava flows...
Since the dawn of history, volcanoes have been an awe inspiring feature of the earth that has frightened and intrigued mankind. Volcanoes have taken the lives of over 250,000 people in the last three hundred years and changed the lives of millions of others, but up until recently humans have had very little understanding of the volcanic processes that presage an eruption. The advent and implementation of new technologies and scientific methods has allowed us to begin to comprehend the inner workings of one of nature's most powerful forces. Through understanding how volcanoes work, volcanologists hope to accurately predict when an eruption may occur, what the magnitude and type of eruption will be, and what effect it will have on the surrounding area. Accomplishing this daunting task will ensure that in the future when an eruption occurs, the population at risk will be prepared and lives can be saved.
From modern examples and records we know that volcanic activity can set of a chai...
Stories about volcanoes are captivating. Myths come in different versions, but all of them are capable of capturing yours, and everybody’s imagination.
It was noon when the peak of Vesuvius erupted, the eruption propelled a 20 mile high Colum into the stratosphere at twice the speed of sound. For the next 12 hours heavy showers of ash fell out of the cloud and onto Pompeii and eventually buried the streets under six feet of rouble. However this did not kill the people.
Mount Vesuvius was one of the most dangerous volcanoes, one of it’s eruptions changed peoples lives. Pompeii, the city in italy 5 miles away from Vesuvius, had lots of wealthy people living in the area. They had paved streets and fancy buildings. Pompeii was a resort for rome's most distinguished citizens.
Volcanoes are one of natures most interesting and dangerous phenomenons. The way volcanoes operate can be understood, on a basic level, by just some simple physics and chemistry, this paper will investigate and explain some of the basic physics that govern the behavior of volcanoes.
while trying to help the residents of Pompeii. Today the type of eruption that Mount Vesuvius
A volcano is the product when magma, gases, and rock fragments from underground are pushed up from the mantle. When volcanoes erupt, they expel granitic and andesitic materials that have been building up through the crust, creating an explosion of lava and ash. Volcanic landforms are formed from tectonic plates, that move and alter the lands and oceans on Earth. Located around the Pacific Plate is a chain of volcanoes, one of which is called Cotopaxi.
Mount Vesuvius is a strato-volcano consisting of a volcanic cone (Gran Cono) that was built within a summit caldera (Mount Somma). The Somma-Vesuvius complex has formed over the last 25,000 years by means of a sequence of eruptions of variable explosiveness, ranging from the quiet lava outpourings that characterized much of the latest activity (for example from 1881 to 1899 and from 1926 to 1930) to the explosive Plinian eruptions, including the one that destroyed Pompeii and killed thousands of people in 79 A.D. At least seven Plinian eruptions have been identified in