INTRODUCTION TO GEOGRAPHY

Introduction to Geography

Introduction to Geography

Introduction

Earth is a full of life planet, and as it moves the crust is continuously pushed or pull as its crust is forming and taking new shapes every now and then. The earth's crust shakes releasing the pressure that is built over a particular time. This sudden movement of the earth's crust is called earthquake. Depending upon its intensity and time duration earthquakes vary. These earthquakes can cause severe damages at places where it struck. Thousands of earthquakes can occur on one single day, but only those earthquakes that have greater intensity are usually noticed. Earthquakes are measure through a Richter scale and any earthquake lying on the Richter scale tight with the magnitude of 7 or above is said to be a big earthquake. The United States of America is comes under the earthquake belt, but it is not as severe as the rest of the countries or continents. Series of small scale events of earthquake with minor intensity are covered in the belt where United States of America lies (www.alaskool.org).

Discussion

The west region encompasses the Atlas neighboring the Mediterranean Sea, the spatial allotment of hypocenters by the side of America showing a gap in the seismic movement. Whereas, the deeper earthquakes describe two comparatively fine belts of movements. Similarly the small scale events as compared to the larger scale events are less. In different regions the protrusion of seismic cross segment is straighter; this is because the geological setting of the structure and the trends showed by seismicity are way far less complicated.

In 1964 Alaska was hit by a powerful earthquake. The Alaska bay generated a tsunami due the earthquake. The earthquake was hit because of the unsettlement among North American and Pacific plates. Major destruction was caused as several people lost their lives; there was a lot of structural harm in different areas and communities, along with land sliding and damage to the property. Not only was this but the soil type also affected due to the earthquake (www.eoearth.org).

Land Movement

The crustal twist associated with the earthquake that hit Alaska in 1964 is said to be the most widespread deformation than any other. The measurement of the uplifts in the earthquake measured 6ft along the side of the coast of Alaska bay. There were four different types of movement I n the land due to the earthquake. Out of the four landslides the most caustic land sliding was the lateral movement known as the translatory, which forms a loss in t he strength of a very weak form of clay of the earth's crust. The second landslide produced a lot of destructive waves from the sea. An estimation of around 98 million cubic yards water front was destroyed. Rock sliding was the third kind of destructive movement in which t he materials shifts at high pace and velocity. The fourth movement was horizontal movement which was a topographic depression of the earth's crust. This was the most destructive movement of all the land ...