For the US tsunami, we are the following. The word "tsunami" comes from Japanese, meaning "long-term exemption". Tens of thousands of Japanese are killed in the centuries and some people are hit by the tsunami, so the tsunami is well known and widely spread in Japan. Tsunamis generally cause a lot of damage including killing, building destruction, expenditure of several million dollars. In addition, the tsunami is a series of huge waves caused by underwater earthquakes, landslides, or volcanic eruptions. The Indian Ocean earthquake of 2004 is located in the epicenter of the west coast of Sumatra Island in Indonesia and is actually one of the most serious disasters in the history of the Indian Ocean.
The tsunami is not just a big wave. They are generated by vertical displacement of seawater due to specific submarine activities. The tsunami is actually a series of waves with a very long wavelength (distance between one wave and the next) and a long wave period (time between waves). These are usually the result of an earthquake, but may also be caused by other dynamic movements such as submarine landslides and volcanic eruptions. The devastating effect of the tsunami comes from the fact that it crosses the depth of the sea, unlike the waves normally seen.
A tsunami is a sequence of waves or series of waves occurring in a watershed. Earthquakes, landslides, volcanic eruptions, explosions, even even meteorites can cause tsunamis. These waves attack the coastline cruelly and can cause destructive material damage and loss of human life. In English, the term "tsunami" means "wave". It is represented by two letters, the upper letter "tsu" represents a port, and the lower letter "nami" represents "wave". In the past, the tsunami was sometimes called "tsunami" by the general public and was called "seismic wave" in the scientific community. The term "tsunami" is a fraudulent term, and the impact of the tsunami on the coastline depends on the tide level at the time of the tsunami, but the tsunami is irrelevant to the tide. The tide is caused by the imbalance of the moon, the sun and the planets, aliens, and gravity. The term "seismic waves" is also misleading
Tsunamis are sometimes called tides. This former popular term comes from the most common appearance of the tsunami, especially the tsunami with a high tsunami. Both the tsunami and the tsunami create waves to move inland, but in the case of tsunamis, the inland movement of water may become larger, giving the impression of incredible climax and strong tide. In recent years the term "tsunami" is no longer preferred in the scientific community in recent years, as the cause of the tsunami is not water movement, not gravity of the moon and the sun, it is irrelevant to the cause of the tide. The meaning of "tidal" includes "similarity" or "tide shape and character", but geologists and oceanographers do not recommend using the word of the tide.