tsunami海啸介绍英语.ppt

小组小组tsunami2021/5/181What is the tsunami？Tsunami is a kind of waves,which has a strong destruction.The waves of tsunami are water,and their height can higher than 10 meters to dozens of meters,form a water wall.2021/5/182How tsunami work?the undersea earthquakethe volcanic explosion of the seabed2021/5/1832021/5/184A great warning sign of an approaching tsunami is drawback,when the seawater recedes quickly or the water level fall unusually along the shoreline.（一个明显的海啸即将来临的征兆是一个明显的海啸即将来临的征兆是“缺点缺点”，当海水快速退去或，当海水快速退去或沿海岸线水位异常下降沿海岸线水位异常下降。）How to predict it?2021/5/185How to predict it?Experts believe that a receding ocean may send out a warning and give people five minutes to evacuatevkjet（撤退）（撤退）.2021/5/186Please rememberYoure not out of danger after the first wave of a tsunami.Move away from the shoreline and go to higher ground as soon as you can.2021/5/187The endThank you!2021/5/188