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For many centuries man did not know why earthquakes occur and how they occur and to what extent they would cause damage.He only felt that mother earth was angry with him and so caused the earthquakes and he always feared it.
We could therefore see that earthquakes commonly occur in volcano prone areas and under the feet of hills and mountains, not well settled in Earth.
Earthquakes frequently occur in China, Japan, Philippines, southern parts of the Himalayas, volcano prone parts of Europe and western parts of North and South America.
In the areas that are more prone to earthquakes, houses are made of lighter material like thatch, bamboo and wood which even when rocked and broken do not injure life.
How to measure the intensity of earthquake: All earthquakes do not cause severe damage.
They are also likely to occur in Rajasthan in India and Arabian countries.
One cannot say that earthquakes do not occur in other places.But the intensity of the earthquakes is not the same in all the areas.The recent experiences reveal that not even a single area of India is earthquake free.It may cause rift in the earth’s surface which further results in water fountains which emit a lot of sand.It may change the course of the river which may cause floods. It also results in the destruction of man-made buildings, roads, railway tracks, bridges and telephone connections.An earthquake is one of the worst natural calamities.As the name itself suggests, earthquakes is the quivering or shaking of the surface of the earth, at some point on the earth.Results of these quakes: All earthquakes did not cause severe damage.Those which are of severe intensity are really dangerous.Earthquakes in India: Looking at near about 1200 earthquakes that occurred in India at various intervals the Meteorological Department has divided the country into five zones.Zone 1: Dangerous; Zone 2: Less dangerous; Zone 3: Medium danger; Zone 4: Much danger prone zone; and Zone 5: Too much i.e. Near about 55% of the land area in India remains in the grip of earthquakes.