Earthquake preparedness
An earthquake is the shaking of the ground caused by a shift of rock along a fracture in the Earth known as a fault. It results in the abrupt release of energy in the surroundings from the Earth's surface. Myths and religions Scientists believe that most earthquakes are the result of the motion of the plates that exist inside the earth surface. Our Earth's inner mantle is a thick layer of solid, dense rock consisting mainly of magnesium and silicon. The outer crust is made up of a number of plates that float on the molten rock of the mantle. These plates are forced to move across the convection currents caused by the heat rising from the centre of the earth. The rate of plate movement can be measured by accurate techniques.
Earthquakes are also premonitions of oncoming volcanic activity leading to an eruption. In a volcano, magma pushes its way upwards against the rocks which vigorously shake the ground. Meteor collision with the earth surface and nuclear explosions contributes to the occurrence of earthquakes too.
The point at which the earthquake centres is called the focus. When the waves carrying the energy come in contact with the surface, it becomes the epicentre.
Bangladesh is situated in a high-risk earthquake zone. But the most important question that arises regarding this issue is: are we prepared for an earthquake looming ahead of us? The issue deserves a closer look.
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