Earthquakes are nature??™s ways of telling us the world is constantly changing. Some changes being obvious and other are not so obvious. In the paper we will discuss changes that occur during earthquakes, where, when why and how they happen. Future more we will discuss patterns in movements of the earthquakes.
Earthquakes occur when pressure beneath the ground heats up and causes movement among molten rock and lava below on land and below the sea. To know exactly what causes the earth to shake lets look at what the earth is doing to causes such actions. In order for the earth the earth to move there are three types of plates that may be affected causing this occurrence. The plates that are in question are the divergent, convergent and transform plates. These plates can have been previously pinpointed by scientist and assumed their names according to the way they move. The divergent plates are like opposites. The reason described as this is because they move away from each other. In their movement beneath the sea floor lava emerges during high pressure moments causing spreading. Spreading is when aged bands of rock to form during each occurrences adding wider bands to previous bands. Divergent plates can be found along the Antarctic plate. The second type of plate isan convergent plate. The convergent plate can be found in several places along the Australian and Japan plates and in the Philippians. These convergent plats are seen as joining because of their movement inward towards each other. When the plates move in towards each other there will be evidence of subduction. Subduction is when one plate move beneath another. This margining can occur on or off land. One example of a convergent plate is the Himalaya Mountains This mountain sits on a convergent plate causing the elevation of the mountain to continue to rise. The last type of plate is the transform plate. Some places transform plates can be found are long the North America coast line and in the Caribbean. This plate is called a sliding plate because the plates slide not away from or towards each other however they vertical passing each other just are a two way traffic lane the one side is allowed to go up the street and the other side goes down the street. This sliding motion occurs causing a margin that zigs and zags because of the friction caused during movement. This friction causing the plates to lock and move several times during a earthquake. During either one of the plate movements causes the earth to quake and or shake. As just stated in the Transform plates moving these must move by zigging and zagging. The locking of the plates during themovement and the friction allows for shaking movements. During the convergent plate moving their earth quakes and shakes due to the movements of one plate below another, in this movement the level of land may rise or subduct some causing volcanic activity. The movement from the separation of the divergent plate??™s causes shaking and movement beneath sea level. The Divergent plates moving apart causes quakes allowing lava to erupt from beneath the ground although this being under the ocean floor is not as obvious unless the geographical area if effected by this constantly causing new land to emerge. All of these movements are called plate tectonics which what causes friction,sliding and all movements during earthquakes. Earth quakes are measured through seismic activity. Seismic activity is message through meters call seismogram that measure the earth??™s movement and vibration. The waves can also be measured by the Richter scale created by charge Richter in 1935 are two types of ground movements that are measured and they are measured in the form of waves. Seismic waves travel through the earth from earthquakes epicenter to the opposite side of the earth. The first wave type is the Shear wave or the S-wave. The shear wave travels up motion called ???shearing.??? The s-waves travel through rocks. The Push waves or P-waves pass straight through rocks and liquids like lava and water.
Boundaries and margins will continue to forms for years to come as the world is ever changing. Boundaries are continuing to grow and margins are continuing to change because of the magma and earthquakes continually occurring for years to come. As new land forms geologist will continue to study seismic activity and hopefully one day there can be a warning system in place for earthquakes to come.