Earthquakes
Causes of earthquakes
Earthquakes are caused by two major reasons. The first reason is because of erupting volcanoes, which are unexpected, and because of these eruptions, it causes the plates to move which is the second cause of earthquake. Earthquakes are caused due to disturbance in the movement of plates, which again can be caused due to various reasons like under crust waves or cracks in the plates.
Plate Tectonic Theory
The outer layer of the earth is divided into many sections known as plates, which are floating on the molten magma beneath the earth’s crust. The movement of these plates is determined by the convection currents. The heat of the molten magma makes these plates rise or fall. Therefore after intervals there are plates that get submerged in the molten magma and there are plates that rise upwards At times, these plates and can be pushed up to form mountains and hills and the movement is so slow that it is really hard to comprehend that there is any movement at all. Now these plates are the bases on which the continents stand and when these plates move the continents also move. Most of the earthquakes occur on the edges of the plates where a plate is under one or across. This movement disrupts the balance and position of all plates, which leads to tremors, which are called earthquakes.Volcanic Eruptions
When volcanoes erupts, it is due to the molten magma under the crust of the earth is under enormous pressure and to release that pressure, it looks for an opening and applies pressure on the earth’s crust and the plate . A place, which is the seat of an active volcano, is often prone to earthquakes as well because the pressure that is exerted by the magma exceeds the limit these plates move and that causes earthquakes. Earthquakes are also caused after a volcanic eruption since the eruption also leads to a distraction in the position of plates, which can move further away or shift places.