The word tsunami means a “huge wave in the bay” and it comes from the Japanese language. The current view point supported by scientific studies recognize tsunamis as lengthy sea waves created by sources from distinct but not meteorological beginnings. These are phenonema such as earthquakes, subteraenean volcanic eruptions, subteranean and surface landslides as well as rockfalls into the ocean. The areas that a vulnerable from the effects of tsunamis are beach areas, ports, tourist facilitiesand their various infrastructure’s. The most vulnerable areas are populations living in lowlands, with steep bays, lagoons, estuaries and deltas following closely.
When one of the many tectonic plates that make up the Earth’s floor descends or “subducts” underneath an adjoining plate,it causes the plates to move all of a sudden in an area where they are normally motionless, an earthquake occurs. This sudden earthquake along a subduction zone causes the raising of the sea floor and the water above it, causing a mighty uplift creating a huge wave, starting a tsunami. This large wave races toward the land, rising higher and higher as it heads towards shore. Another part of the wave travels across the ocean floor bringing debris with it towards distant shores.
To survive when a tsunami hits you must first learn about the possibilities for danger in advance. It is essential to think about in advance no matter whether or not you are living someplace that could most likely face a tsunami. Your residence, school, or place of work could be located in a coastal region, which is close to the sea, with their elevation being at sea level or below and on flat or slightly undulating stretch of land. If you don’t know if the elevation level of your residence, school or place of work is below sea level, find out. This method of using elevation as a warning indicator is used by many local authorities, especially those in developing countries.