Tsunamis are not tidal waves because they are not influenced by gravitational effect of the moon. But their appearance from shore can similar to a rapidly rising or falling tide, and severity of tsunami can be affected by the level of the tide when waves hit land.(from Time, January 10, 2005
La potenza e la di uno tsumami può essere calcolata dal livello della marea quando onde colpiscono la terra.
Remember! The Indian plate (placca) usually moves about 6cm a year. Scientists estimate that in last week's quake, two plates slid about 15m at once.