The worst tsunami was likely one caused by the eruption of the volcanic island of Thera in the Mediterranean in the 1600's BC. The resulting tsunami is believed to have wiped out the Minoan civilization.
Another contender is the 2004 Indian ocean tsunami with a death toll of over 220,000.
at a place on earth
tsunami
most tsunami occur at the sea.
Japan
masie
An earthquake caused the Sumatra Tsunami.
2004
No type of cloud is associated with tusnamis, as a tsunami is not a weather-related phenonomenon. A tsunami can occur during absolutely any type of weather.
There is no way of knowing when the next tsunami will occur.
It is impossible to predict when a tsunami will occur until it actually starts.
2006
japan