The normal coast tsunami waves observed from the shore, where waves spectrum usually have about 1 meter or spectrum does not exceed 10 m, but for long-term tsunami 100 kilometers or more wavelengths of about 100 kilometers.
Tsunami waves are usually observed from the normal tidal waves which have wavelengths of about one meter, or up to 10 meters, but for tsunami wave length range of approximately 100 kilometers or 100 kilometers.
Wave normal coast with the tsunami observation from the wave, which wave normal range coast wave around 1 meters or not more than 10 meters, but for the tsunami wave phase range about 100 kilometers or more 100 kilometres.