Destruction Caused by Volcanoes
Over 550 volcanoes have erupted on the surface of the Earth since human kind has been able to record history. Their destructiveness has claimed the lives of over 200,000 people during the last 500 years with 26,000 deaths between 1980 and 1990 alone. They have also cause an innumerable amount of property damage. The biggest eruption of the twentieth century was the eruption of Novarupta on the peninsula of Alaska. The amount of lava that erupted measured to roughly 15 cubic kilometers. All of the lava erupted equaled to the amount of 30 times the amount of lava that came from Mount Saint Helens and it is also the equivalent of 230 years of eruptions at Mount Kilauea. The eruption lasted for 60 hours on June 6, 1920. The biggest eruption, despite its size, was not the most destructive, for the most destructive was the eruption of Mount Saint Helens in Oregon during the week of May 18th, 1980. This eruption mainly caused just loss of property, because many people didn't expect the volcano to erupt. Although some people did die, this volcano was kind of weak compared to the size of the eruption and amount of lives lost in other eruptions like Tambora, Indonesia in 1815 where 92,000 people died.San Francisco suffered a major earthqu
The earth's plates are continually moving, perhaps as much as several inches a year. As they move, they bump against each other. They can spread apart from each other, or push against each other. By pushing and pulling in this manner the plates open up fissures that allow magma to seep to the surface or into pockets under the earth. The magma contains to flow into crevices and pockets and pressure builds up. Earthquakes can sometimes open up the pockets and allow the pressure to be released. Other times a earthquake will follow a volcanic eruption, although it is recorded that earthquakes and volcanoes do not cause each other, they are so closely connected that they appear to be the result of one another. Often times during a volcanic eruption there will appear to be an earthquake, this is usually not so, its just the ground shaking caused by the explosions. When lava seeps from surface vents made from earthquakes, it is not a volcano. There have been no recorded volcanoes or earthquakes that have been clearly the direct result of one another. ake that killed 3000 people, the earthquake lasted for about 40 seconds and was recorded at 8.3 on the Richter Scale in 1906. People ran from there houses and some stayed inside the buildings and were crushed. The people who ran in the streets were killed by toppled buildings falling from above. There fire department was efficient but the water pipes that go down the San Andreas Fault were s
Some common words found in the essay are:
Loma Prieta, Andreas Fault, , San Francisco, Helens Oregon, Richter Scale, Mount Kilauea, California Sacramento, North American, Los Angeles, san francisco, space water pressure, san andreas fault, mount saint helens, pore space, water pressure, space water, lava erupted, volcanic eruption, biggest eruption, pore space water, shear strength, soil's shear, east fault, water saturated soils,
Approximate Word count = 971
Approximate Pages = 4 (250 words per page double spaced)
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