On 27 August 1883, a huge eruption destroyed the island almost Karakoa. From this huge explosion has created enormous ocean waves. The waves reached a height of 30 meters above sea level and has managed to wipe out hundreds of villages with a velocity of 1000 km per hour. The people affected by thousands of miles away in Australia and Canada.
In 1946 there was a great earthquake on the seabed near the Aleutian Islands. A giant wave traveled through more than3500 km in just 4.5 hours and has hit Hawaii. He threw houses and bridges in the air and carried him several hundred yards away. At that time, 170 people drowned.
Tsunami
A tsunami, as described above is on top of the scale of natural disasters. Tsunami waves are waves that are suggested by this earthquake. You do not know how many times the waves can be seen near the coast, and have nothing in common with the wind and tides.
Scientists have a special name for these waves. TheirJapanese call them the name of a tsunami. Tsunami means harbor wave. The shock wave or tsunami is caused by a disturbance of the seabed on, usually because of an earthquake on the ocean floor. However, volcanic eruptions, do a little 'underwater explosions, landslides, mass movements above and below the water to a tsunami.
After a failure, the increase in the ocean or fall suddenly, the water mass above it also increases or decreases. This strange movement of watermakes a series of strong waves. The first wave passes through water the same as the sound through the air. It is really fast, without losing energy. At sea, a tsunami can reach speeds up to 950 kmh. When you close down, reduce speed and wave height increases. Increase in size and reach places that reach the normal high water could not.
A tsunami can be maintained for several hours or several days, depending on its position. A tsunami ispowerful enough to strip sand from beaches, crush pull off the roofs and buildings. People and boats can not do anything about a tsunami. A tsunami can not be avoided, but the availability can impact the community to support timely and effective rescue can be reduced. For example, in Aonae, Japan began 10 minutes after the earthquake, tsunami, many casualties were avoided, because they have been educated about tsunami evacuation plans had developed, and above all has been issued a warning.
What is a tsunami?
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