Tsunami Question

[johnar]

Hello all, I have a question that is on my mind. I understand that Tsunami's do not happen often but when they do if people are at sea while it hits them without notice will the boat and people survive? I know back in 2004 one hit in the Indian Ocean and i am sure some people had to be traveling at the time due to the aria it covered. What happen to the people? Thank you John

[Nausikaa]

John,

It all depends upon the depth of water. In the deep ocean you probably would notice nothing at all but as a wave, whatever causes it, crosses the continental shelf and enters shallower waters the wave becomes much shorter and steeper and, thus, far more likely to cause damage. So, in answer to your question, if you are in deep water off the continental shelf there should be no problems at all. In deep water on the continental shelf, say in 200 metres you will be alright but the wave will become more noticeable. Where you don't want to be is in shallow water.

I hope this answers your query. If not, you will find a very good (much better than mine) explination here

Aye // Stephen

[Seafever]

During the Great Tsunami of 2004 not one person on a yacht was lost or injured amongst over a 1,000 yachts reported on.

Check Cruiser Log's home page , click on the RSS feed Asia Tsunami (yachts) RSS

[Nausikaa]

Should also add that the wave height also depends on the bottom topography. In a V-shaped under water valley a wave similar to a bore can develop.

Aye // Stephen