Japan Earthquake

Tsunami is thedisplacement of water bodies caused by changes in sea surface vertically with a sudden. Changes in sea level could be caused by an earthquake centered under the sea, underwater volcanic eruptions, underwater landslides, or hit by a meteor at sea. Tsunami waves can propagate in all directions. In the ocean, tsunami waves can propagate with a speed of 500-1000 km per hour. Equivalent to the speed of aircraft.

High waves in the sea in only about 1 meter. Thus, the wave speed is not felt by the ship which was in the middle of the sea. When approaching the coast, the tsunami wave velocity decreases to about 30 km per hour, but its height was increased to reach tens of meters.

The negative impact caused by tsunamis are destroying everything in its path. Buildings, plants, and resulted in human casualties and causing inundation, salt water contamination of agricultural land, soil, and clean water.