Reasons Why Subduction Zones Are Dangerous Places

This lab uses earthquake data to construct profiles of two convergent boundaries: the Tonga Trench and the Peru-Chile Trench. Where two tectonic plates converge, if one or both of the plates is an oceanic lithosphere, a subduction zone will form. When crust is formed at a mid-ocean ridge, it is hot and buoyant meaning it has a low density. As it spreads away from the ridge and cools and contracts, or becomes denser, it is able to sink into the hotter underlying mantle. When two oceanic plates collide, the younger of the two plates, because it is less dense will ride over the edge of the older plate. The density of the

It is believed that this volcanic area was caused by a localised hot spot within the Pacific plate. A concentration of radioactive elements inside of the mantle may have caused this hot spot to develop. The hot spot is stationary so as the Pacific plate moves over it a line of volcanoes are made. This is more proof that the Earth’s crust is moving as suggested by Wegener.

The Pacific Ring of Fire reveals a connection between subduction zones and volcanoes. Inland of each subduction zone is a chain of spouting volcanoes called a volcanic arc, such as Alaska's Aleutian Islands. The Toba volcanic eruption in Indonesia, the largest volcanic eruption in the past 25 million years, was from a subduction zone volcano.

California is the most expensive and the beautiful cities of the world. It is the one of the populous states of the USA. California is very beautiful and attractive for the tourist. Because the state of California contains almost all types of weather conditions in different parts of the State. As far as the California is beautiful but is also one of the expensive States of the USA. Because the California is situated near the Pacific Cost due to which the tourist and the peoples all arounds the worlds come to see the Natural scenes and different types of Tourist sites in the State. If someone wants to his vacations memorable then he visits the city of dream California. Because California is one of the expensive

In conclusion the recent conception and development of plate tectonic theory has greatly aided our understanding of the distribution of seismic events. We now understand that there is a correlation between earthquakes/volcanoes locations and their proximity to a plate boundary plates are continually moving and earthquakes and volcanoes are found along these boundaries. Exceptions to this rule such as Hawaii also help prove tectonic theory due to their unique creation. Whilst this has helped our understanding we also recognise the fact those in LEDCs with poor access to education are unaware of plate tectonic theory so they cannot understand the hazards that some countries face, nor have the means to mitigate against them thus worsening the

The volcanoes are located where there is a divergence or convergence in the tectonic plates and bring their lava from the deepest of the terrestrial mantle. The materials and explosions of these ginates represent a constant risk in the places inhabited by the human being, nevertheless the people ususually live in these areas no matter the risk. On the other hand the volcanos can change the geology of an impressive form, or to cool the temperature of the earth, or to darken the sky. The scientific community increases its efforts to try to understand better what happens in volcanoes, however it is impossible to predict these conditions.

Moretti states that the economic map follows the three America theory that divides the United States into three different classes. He uses this theory to explain why these disparities occur between regions and their divisional factors. On the one hand, high wages for a skilled and unskilled labor force, on other low levels and declining markets and between the two, undecided cities. In other words, innovative cities, traditional manufacturing regions and in between the towns that can go anyways. What we can observe is that places where highly specialized innovation is predominant, for example where the engineers and designers are, clusters generate for each job created an additional five jobs outside the high technology industry. We can attribute this reason to the dense cluster phenomenon which the multiplier effect of high-tech companies when they are located near each other. The result of creating additional local service jobs increase significantly because people with a high average of wages tend to spend part of their salary on wealthy service. Moretti refers this type of employment as the non-traded sector, to exemplify, it is jobs that only be performed by the local workforce. On the opposite direction, the manufacturing industry

Geographically California is located in the Western Coast of North America, and is the third largest State in the United States. The largest cities are; Los Angeles which is known for Disney Land, San Diego which is known for the Sea World, San Francisco which is known for the Golden Bridge and Sacramento which is known for the largest preserved historic district of the Gold Rush and for being its capital since 1854. Although California superiority comes from its warm weather, it does have the most diverse Geography. The Central Valley which is in the center of California dominates do to the major agriculture area. “the Sacramento Valley was then a true sea of grass, grass so high a man riding into it could tie across his saddle.” (Didion.

Two significant environmental or physical geographic factors that contributed to the development or expansion of the United States were the California gold rush and the dust bowl.

Plate tectonics are very dangerous when they collide,slide,and move apart. They can create mountains like the Appalachian Mountains that used to tower over everything then erosion took place. The Appalachian Mountains were formed by convergent boundaries, convergent boundaries are collide

The northern part of California attracted Americans due to the San Francisco harbor and the rich, fertile soil which became a main reason for settlement in the area. Americans were frightened that pressure to part with Oregon would motivate

attributes and smaller in growing ones. People overall are finding better areas to live in which

Large magnitude earthquakes occur on plate boundaries and can produce hazards such as movement along faults, landslides, and tsunamis. In North America, the western coast is an active margin, meaning that it is home to earthquakes and

California, nicknamed the Golden State, has attracted many an immigrant through the years. From the migrations of peoples thousands of years ago that led to the establishment of the many Native American tribes that populated the land, to the Spanish and Americans in later centuries, one wonders what attracted all to the farthest frontier, the unsettled west coast. That is until you delve deeper into what the land had to offer as an economic source. The year 1769 saw Gaspar de Portola and Father Saint Junípero Serra leading the first permanent European settlers to California. Before the end of the century, missions were established along the coast and towns were established, especially Los Angeles in 1781. The establishment of missions and towns began economic growth based on agricultural production and Native American labor that would soon lead to cities, ranches and local owners under Mexican occupation taking the same advantage to produce locally until the United States brought a wave of new settlement and industrial ideas that would sweep local trade and production into a new era of transcontinental economic growth, transportation and financial gains.

Heat emission from subduction zones can take many forms, such as volcanoes, geysers and hot springs. When lateral plate movement induced gaps occur between plates, collisions occur between other plates. This results in partial plate destruction. This causes mass amounts of heat to be produced due to frictional forces and the rise of magma from the mantle through propagating lithosphere fractures and thermal plumes sometimes resulting in volcanism. During plate movement, continental plates are constantly being consumed and produced changing plate boundaries.