Earthquakes are an example of seismic activity caused by the build-up of tension at the three types of plate boundaries: destructive, constructive and conservative. The pressure is suddenly released as the plates jerk past each other, sending out seismic waves from the focus that travel through different parts of the earth. The movement of convection currents within the Earth’s mantle causing the crust to become mobile which creates the different types plate margins, makes the cause due to physical factors. However human activity is suggested to be the cause of some minor earthquakes, for instance the building of large reservoirs where the water stresses the surface rocks or the subsidence of deep mine workings.
The seismic waves cause the initial effect of ground shaking. The severity of this will depend upon the nature of the event such as the …show more content…
They can be merited for reducing the impacts, particularly short-term where effective response and management operations are in place; on the other hand they can be criticised for not doing enough to limit impacts of earthquake hazards, especially secondary deaths like as a result of disease due to insufficient fresh water being supplied following water contamination. However this is very much determined by the economic state of the country as money allows advances in preparation from improved buildings to warning systems from increased knowledge and professionals in mechanics and technology, and in responses to help prevent and restore the damage; both limiting the overall