The Alaska Earthquake Research Paper

There are three different types of plate boundaries. The first type of plate boundaries is, the spreading boundary. A spreading boundary is when two plates move apart. The spreading boundary is also known as a divergent boundary. The second type of plate boundary is a colliding boundary. A colliding boundary is when two plates come together, or collide. It is also known as convergent boundary. The third is, a sliding boundary. A sliding boundary is when two plates slip past each other moving in opposite directions. It is also known as transform boundary. Those were the three different types of plate

In Valdivia, Chile 1960 an earthquake changed the lives of many. An earthquake is the violent shaking of the ground that will destroy homes, buildings, landforms, historical monuments, and lives. Earthquakes begin with the breakage of rock along a fault line. When two tectonic plates rub against each other they create an earthquake. Earthquakes will ride along a fault line which will determine how long the quake will go on. The larger and longer the fault like the bigger the earthquake. Earthquakes send out waves, primary waves or, p waves and secondary waves or, s waves travel along the interior of the earth. These two waves are called body waves. While detecting the waves, the primary waves appear first then the secondary waves. Primary waves travel through solids, liquids, and gasses, which means they are about to travel through the liquid center. Secondary waves are only able to travel through solids which are why scientists have found that there is a loss of these waves once they reach the center.

The theory of plate tectonics states that the Earth’s lithosphere (top layer of the Earth’s crust) is split up into rigid sections called plates that are moving relative to one another as they move on top of the underlying semi-molten mantle. These plates are either continental, The North American Plate, or oceanic, The Nazca Plate.

The Earth is a very detailed planet; there are many actions going on at once on this planet. The Earth has many boundaries, plates. and layers. The plates beneath our feet mold the world we live in. While very slowly, the plates are indeed moving. There are a few variations to the plates; they have different directions in which they move in relation to separate plates. These changes in plate movement have different side effects, from ocean trenches to miles of mountain ranges.

The 1906 San Francisco Earthquake tectonic setting was in the outermost shell of earth known as the crust this is composed of rigid plates that have been moving for hundreds of millions of years. Two of these moving plates meet in western California; the boundary between them is a zone of faults, the principal one being the San Andreas fault. The horizontal sliding of the Pacific Plate relative to the North American Plate, causes earthquakes along the San Andreas fault and similar plates near the region. The San Andreas fault is a transform plate boundary, accommodating horizontal relative motions (usgs.gov).

The tectonic setting for the 1906 San Francisco Earthquake was in the outermost shell of earth consisting of rigid plates that have been moving for hundreds of millions of years. Two of these moving plates meet in western California; the boundary between them is a zone of faults, the principal one being the San Andreas fault. The Pacific Plate (on the west) slides horizontally northwestward relative to the North American Plate (on the east), causing earthquakes along the San Andreas and associated faults. The San Andreas fault is a transform plate boundary, accommodating horizontal relative motions (usgs.gov).

Earthquakes are caused when two blocks of earth suddenly slip past one another. The surface where the two blocks slip is called the fault. The earthquake starts below the earth’s surface at the hypocenter, and the location above the hypocenter is called the epicenter. Earthquakes can have foreshocks which is a smaller earthquake that happens before the larger quake. Earthquake can also

What is an earthquake and why do they happen? : An earthquake is vibrating of the ground caused by the rapid breaking and motion of large parts of the earth’s rocky outermost crust. Earthquakes

The most common cause of earthquakes is movement along faults. Earth’s crust is divided into tectonic plates, which grind past each other at fault boundaries. As tectonic plates move,

“I felt very at home in California, but the place is prone to earthquakes, and the one in 1944 scared the life out of me. For months afterwards, I felt that every time I sat down, I should have to put on a seatbelt.” Earthquakes are when tectonic plates slip past each other causing a “snap’. The ground shakes violently and can even crack. Though the occurrence of an earthquake is dreadful, familiarizing yourself with the causes and effects can be useful, and in turn make it less scary.

Earthquakes does not often occur in the middle of plates, however they do happen when old faults or rifts far below the surface reactivate. These areas are weak compared to the surrounding plate, and can slip easily and cause earthquake.

When the rocks underground suddenly broke along a fault, one side of the fault slipped. A fault is a thin zone of crushed rock separating blocks of the earth's crust. The rocks then began rubbing against each other, and catching. After a while, the rocks broke because of all the pressure that was built up. When the rocks broke, the earthquake occurred. During and after the earthquake, the plates or blocks of rock started moving, and continued to move until they eventually stuck. The spot underground where the rock broke is called the

Epicenter – the exact point on the surface of Earth directly above the location where the rock ruptures 6. Ring of fire – an area around the Pacific Ocean with intense tectonic activity G. The environmental earthquakes and volcanoes 1. Richter scale – a logarithmic measure of the largest ground movement that occurs during an earthquake 2. Dangerous in areas of structures subject to collapse 3.

The crust of the Earth is broken into pieces, called tectonic plates. Tectonic plates are constantly moving, the continents are part of these plates and are also moving. The cause of the 2010 Haiti Earthquake were the movements of the Caribbean and North American tectonic plates.

     An Earthquake is the shaking of the earth's surface caused by rapid movement of the earth's rocky outer layer. The sudden shaking of the ground that occurs when masses of rock change position below the Earth's surface is called an earthquake. The shifting masses send out shock waves that may be powerful enough to alter the surface of the Earth, thrusting up cliffs and opening great cracks in the ground.