Effects of Earthquakes

Tsunami

A tsunami can be generated when destructive plate boundaries abruptly move and vertically displace the overlying water. The seismic waves caused by earthquake travelling through sea water generate high sea waves and cause great loss of life and property. Large waves produced by an earthquake or a submarine landslide can overrun nearby coastal areas in a matter of minutes. Tsunamis can also travel thousands of kilometers across open ocean and wreak destruction on far shores hours after the earthquake that generated them.

source: YouTube

Tsunamis have a small wave height offshore, and a very long wavelength, which is why they generally pass unnoticed at sea, forming only a slight swell usually about 300 mm above the normal sea surface. and they travel quickly at speeds over 700 km/h. They grow in height when they reach shallower water.

Human Impact

Fresh water supplies are often cut off causing typhoid and cholera. Lack of shelter and food causes much suffering. An earthquake may cause injury and loss of life, road and bridge damage, general property damage, and collapse or destabilization of buildings. The aftermath may bring lack of basic necessities, mental consequences such as panic attacks, depression to survivors.
Death, destruction of infrastructure, disease, long term issues with the economy. Shock and Panic.

source: YouTube

What How Why

What are the most precious stones?

When the magma cools, the material which it contains solidifies in the form of crystals. Precious stones are crystals with particular characteristics of colour, hardness and the way they can reflect the light. They are used in making jewellery.

When we look at the landscape, it all seems quite still and and unaltered. But, very slowly , Earth is continually....... read more.