How do earthquakes generate tsunamis?

The reason for the occurrence of tsunamis after earthquakes are changes in the shape of the seabed. When the fractures caused by the earthquake cause some of the sea floor to rise, the sea water with very low compressibility also rises. The resulting swelling is unstable and the seawater it contains begins to spread around under the influence of gravity.

Tsunami waves are not like normal sea waves. Since the region affected by the earthquake can be very large, the length of the waves formed during the tsunami can also be very large - for example 300 kilometers. This means that the tsunami waves may have clocks between the two hills' arrival times. Therefore, the incident that occurs when the tsunami approaches the shores may also appear as the sea rises rapidly during the tide.

The fact that the two peaks can be between the time of arrival to the shore means that the coastal area will be under threat for a long time after the tsunami begins to hit the shore. Therefore, when there is a danger of tsunami, it is necessary to not be fooled by the smallness of the first waves that hit the shore and move away from the area quickly. Because the waves that will hit the shore after hours may be much larger.