Question

В открытом океане высота цунами не превышает...,а при приблежении к берегу достигает высоты...

Answer 1

1  -  2  м в открытом океане
при приближении к берегу  несколько десятков метров  (30-40м),  до 50 метров

Answer 2

Height of Tsunamis in the Open Ocean and Near the Coast

The height of a tsunami can vary depending on its location. In the open ocean, the height of a tsunami does not typically exceed a certain value. However, as it approaches the coast, the height of the tsunami can increase significantly.

Unfortunately, the specific numerical values for the maximum height of tsunamis in the open ocean and near the coast are not provided in the search results. However, it is important to note that the height of a tsunami can be influenced by various factors, such as the magnitude of the earthquake or underwater landslide that triggered it, the depth of the water, and the shape of the coastline.

Tsunamis in the open ocean generally have relatively low amplitudes, often measuring only a few feet or meters. As they travel across the deep ocean, the energy of the tsunami is spread out over a large area, resulting in a relatively small wave height. However, the speed at which a tsunami travels can be quite high, reaching speeds of up to several hundred miles per hour.

When a tsunami approaches the coast, the wave height can increase dramatically due to the shallowing of the water. As the tsunami encounters the continental shelf and the coastline, the wave energy becomes compressed, causing the wave height to rise. The exact increase in height will depend on the specific characteristics of the coastline and the underwater topography.

It is important to note that tsunamis can be extremely dangerous, regardless of their height. Even relatively small tsunamis can cause significant damage and loss of life when they reach the coast. Therefore, it is crucial to have effective early warning systems and evacuation plans in place to mitigate the impact of tsunamis.

In summary, while the specific numerical values for the height of tsunamis in the open ocean and near the coast are not provided in the search results, it is clear that tsunamis in the open ocean generally have low amplitudes, while their height increases significantly as they approach the coast. The exact height of a tsunami will depend on various factors, including the characteristics of the coastline and the underwater topography.