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Earthquake - planetpedia

Effects of Earthquakes

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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 is a leap Year?

It takes the Earth 365 days and six hours to orbit around the Sun. The Six extra hours cannot be counted on the calander. So, to keep an accurate count, an extra day is added at the end of february every four years.

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.

What How Why

How is the height of a mountain measured?

To measure the height of mountain, the surface of the sea is taken as the point of reference. The height of the mountain is the distance between the top of the mountain and the surface of the sea.

What How Why

What is an electric current?

An electric current is a passage of electrons from one electrified body to another which is less charged. When too many electrons are generated, they can move.

What How Why

Why does iron go rusty?

Rust forms on the surface of iron objects when they are exposed to the air. It is the product of a chemical reaction called oxidization. The more the object is exposed to the air, the more rapidly rust spreads.

What How Why

How fast can a dog run?

A Greyhound can run at a speed of 64km per hour, a Weimaraner , once used for hunting wolves and wild boar, can reach speed of up to 56 km per hour in a chase. Many breeds of dog which were once bred for hunting are now more common as pets than hunting Dogs.

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