Earthquakes are tremors, which are produced by the passage of vibratory waves through the rocks of the earth. Man has always feared earthquakes. The devastation caused by earthquakes to the life of man and property is sometimes more than that caused by volcanic eruption.
Causes of Earthquakes
Volcanic Activity. It was Aristotle who for the first time related the phenomenon of earthquake to physical factors. According to him when the air, compressed within the interior of the earth, escapes out, it shakes some part of the land.
The emission of volcanic material reduces this pressure but the emission of hot gases, lava, etc., creates an earthquake wave in the surrounding areas. These waves were known as earthquakes.
Faulting. The main causes of volcanic activity are considered to be faulting. When a new fault is formed or there is a movement along an old fault, an earthquake always results. There was a movement along a distance of 435 km., of San Andrea's fault.
Isostatic Adjustment. The isostatic balance between the depressed and the raised up blocks of land on the surface of the earth is not always maintained. The sediment eroded from the continents and swept up to the sea disturbs the balance. The balance is regained when the higher blocks are raised up again. During this process earthquakes are produced at zones of weakness.
Locals hypothesize that the legacy of Italian blood and culture in Cologne, colonized by the Romans more than 1500 years ago, makes the people more jovial and lighthearted. Cologne is the largest city on the Rhine.
Kolsch is not only the dialect spoken here but, also the name of their own top-fermented beer. There are more than 4,000 pubs, restaurant's and brewery taverns in Cologne.
Unlike many of the world's large cities, Cologne, with a population of over a million, gets better every day, there are more things to do and see, more new and innovative buildings... more
Travel is an opportunity to learn, whether geography, languages, history or other subjects.
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Cologne is situated on the beautiful Rhine River.