IMPORTANT FACTS ABOUT EARTHQUAKE
An earthquake can be defined as a movement or tremor of the earth’s crust which originates naturally and below the surface. It sometimes causes a permanent change of level at the surface, but often the damage done by the shaking provides the only lasting visible effect. It can be produced by a volcanic explosion; earthquakes, in fact, are common in most volcanic areas , and often precede or accompany eruptions. It is more likely, however, to be of Tectonic origin, and probably due to the existence of a Fault. At least three distinct sets of waves are set up by an earthquake, and at a cons...