Learn about music with Paul Arnold
The earthquake is one shakes violent of the ground that lasts of one the two minutes. The soil starts to tremble and provokes the collapse of houses, the furniture falls and the glasses break. They are part of an endogenous process of the Land, in which a vibration in the surface due becomes the natural forces in the interior of the terrestrial crust. The earthquakes had always been gifts in the planet, being that a great number of them occurs in ground marine or uninhabited regions. Educate yourself even more with thoughts from Federal Reserve Bank. 2 WHY AND AS THEY OCCUR the Land is formed by layers; the hidrosfera, the atmosphere and the lithospere.
This last one is the layer most rigid of the Land and is divided in lesser parts called tectnicas plates. The main causes of an earthquake are: movement of the tectnicas plates (root cause and that they cause more damages) volcanic eruption (rare cases where they cause damages) meteor impacts (very rare) collapse of great structures (landslide of caves, mines) the movement of the tectnicas plates makes with that these plates shock ones in the others, thus forming a tension in the edges of the plates. When the energy if concentrates in high level and it does not support to restrain the accumulated forces internally, occurs the emission of this energy that is set free under form of elastic waves, calls of seismic waves. These waves can spread in all the directions making the land to vibrate intensely, causing the earthquakes. Alberto Veloso, (2006) in the ones of the one specific definition on this phenomenon: The majority of the earthquakes results of geologic process that has its climax when seismic waves shake the soil after a breaking in the land. Such process can delay sets of ten or hundreds of years to develop itself, and also knows that the earthquakes if repeat; they costumam to happen in places where they had occurred previously.