Natural Disasters

○ Avalanche ○ Earthquakes

○ Hurricanes ○ Landslides

○ Thunderstorms ○ Tornados

○ Tsunami ○ Volcanoes

○ Floods

Avalanche

Earthquakes

Hurricanes

Landslides

Thunderstorms

Tornados

Tsunami

Volcanoes

Floods

Tsunami

What is a tsunami?

Tsunami is a series of water waves caused by the

displacement of a large volume of a body of water, usually an

ocean

Causes of TsunamiEarthquake

Volcanic eruption

Underwater explosions

Meteorite impacts

Size of TsunamiTsunamis have an extremely long wavelength (wavelength is the distance between the crest (top) of one wave and the crest of the next wave) -- up to several hundred miles long. The period (the time between two successive waves) is also very long -- about an hour in deep water.In the deep sea, a tsunami's height can be only about 1 m (3 feet) tall. Tsunamis are often barely visible when they are in the deep sea. This makes tsunami detection in the deep sea very difficult.

A tsunami can travel at well over 970 kph (600 mph) in the open ocean - as fast as a jet flies. It can take only a few hours for a tsunami to travel across an entire ocean. A regular wave (generated by the wind) travels at up to about 90 km/hr. 

The endDone by/ Ahmed Elwan