Tsunamis are usually caused by drastic geological changes in the offshore continental shelf, such as earthquakes or tropical hurricanes. Weihai offshore continental shelf has relatively stable geology and low probability of occurrence. After a tropical hurricane moves to Weihai, it will generally weaken into a tropical storm, so the probability of a tsunami in Weihai is very low, but a typhoon will occur, but the harm caused by the typhoon is much less.