chain of waves. The main cause of tsunamis are submarine earthquakes. These are most common at subduction zones. Friction between subducting plates causes a build-up of pressure‚ eventually this pressure is released causing an earthquake. These submarine earthquakes can displace huge volumes of water. On the 26th December 2004 at the Indian plate/ Burma plate subduction zone‚ lots of pressure was suddenly released north-west of the coast of Sumatra‚ resulting in a megathrust earthquake of 9.1 on the
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also affecting several ecosystems‚ and human health. 1.1 Thera/Santorini’s Location Santorini’s location is dangerously placed in a particularly volcanic area on the Aegean plate‚ the south Aegean volcanic arc (Fig. 1).3 The region’s islands formed as a result of interaction between the Aegean plate and the African plate.3 Santorini is located in the middle of the Aegean sea‚ surrounded by several major Mediterranean civilizations existing in mainland Greece‚ northern Africa and Asia minor. The
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crustal plates are bumping each other. On May 22‚ 1960‚ in the middle of the afternoon‚ a wide range of place started to quake‚ near Valdivia‚ in southern Chile and lasted in 7 to 10 minutes. Consequently‚ dozens of islands and countries were affected; and the death toll‚ and monetary costs skyrocketed. Everything has its own reason. As for the Great Chilean Earthquake (or the Valdivia Earthquake)‚ it occurred‚ caused of the release of mechanical stress between the subducting Nazca Plate and the
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Movement Essay Continental Drift is the idea that refers to the movement of Earth’s continents and plates relative to each other. This means that the earth’s plates move because of the unending cycle of cooling and raising of molten rock‚ adding new material t0 the edges of the plates. This movement is called divergent movement‚ the most common of the three types of movement between plates. The other two movements are called convergent and transform-fault. This idea was first suggested by
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terrified. It affects earth‚ people and property. Earthquakes can do a lot of damage and I will tell you about the effects from them. The first thing earthquakes effects is earth. When two continental plates meet‚ earthquakes are happening‚ volcano eruptions and mountain formation caused by continental plates. Earthquakes cause the ground to shake and creates cracks and holes in the ground. They can also make trees and other objects in the wild or nature‚ fall and crash into the ground. Soil in the ground
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rise and fall within the mantle‚ the crust breaks up into large pieces‚ called plates‚ which move about very slowly on earth’s surface. The movement of the plates creates powerful forces that continually create and destroy land features and reshape the earth’s surface. Most of the action takes place at the plate edges‚ or boundaries‚ where plates move against or over each other‚ or dive back below the surface. As the plates move‚ mountains are uplifted‚ the sea floor cracks and spreads‚ volcanoes erupt
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EAR 105 extra-credit study guide. This is both a study guide and an extra credit assignment worth 10 points on your exam! Using your class notes and the book‚ please answer the following questions with words or with sketches. Use this as a study guide. Remember‚ it will count as extra credit toward your test grade. You may work in groups of 4 or less. If you do work in groups‚ all names go on ONE copy that is handed to me. You may work on separate sheets of paper‚ or answer using this document
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Houston‚ Seattle‚ and San Francisco have all experienced a fault shift. In the case of Houston‚ the likelihood of an earthquake is extremely low. The instances of a fault shift on that area of the North American Plate don’t occur often. Earthquakes that occur are not by normal means of plates shifting but from the process of fluid extraction (Fehling 19). Seattle on the other hand has a very high probability of an earthquake occurring. There are three different types of quakes that the city experiences
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Mount Saint Helen’s Volcano‚ part of the cascade mount range‚ is associated with the subduction zone of the Juan du Fuca plate into the North American plate‚ as is most of the volcanism in this mount range (USGS Geology & History). The eruption intensity is normally quite explosive but Mt. Saint Hellen’s has experienced the peaceful one on occasion (USGS Geology & History). With frequent eruption every couple hundred years (rough estimate at best)‚ Mt. Saint Helen’s is the most active volcano of
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1. What is the ultimate cause of movement within the earth’s crust? ANSWERS: Radioactive decay generates the heat energy that powers movements of plates. 2. What causes earthquakes? ANSWERS: Friction between the rough edges of slowly moving segments or plates of the earth’s lithosphere result in a series of jerky starts and stops which is the direct cause of most earthquakes. 3. What is a fault? ANSWERS: Faults are fractures in rocks along which displacement has taken place 4
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