Why did the tsunami reach Jiangsu after Zhejiang?

Tsunamis are often caused by earthquakes of magnitude 7 or above and vertical rock dislocation. Tsunamis spread in all directions like waves after throwing stones. The earthquake in Japan occurred on the east coast of Japan. After the earthquake, the waves caused by the tsunami should spread to the east and west of the island.

Experts further explained that from the time map of tsunami propagation released by the National Ocean Forecasting Station, the tsunami waves spread around the epicenter layer by layer in the form of concentric circles. In China, it first spread to the eastern coast of Taiwan Province Province, and then to the coastal areas of Guangdong, Fujian and Zhejiang. Because the coastlines of Jiangsu and Shanghai have obliquely "bent" into the relative inland sea position, they are affected by time.