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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?


To: tejek who wrote (215288)1/18/2005 8:33:51 AM
From: combjelly  Read Replies (1) | Respond to of 1573868
 
"Someone just said that a tsunami can last hours......."

Most tsunamis are the result of some sort of displacement in the sea floor. That is roughly equivalent to dropping a pebble in a pond. When you do something like that, you don't just get a single wave, you get a series of waves of decreasing amplitude. In addition, tsunami waves have a very long wavelength, so those waves are spaced out at a distance of up to 200 km. Here is a good description of the whole process.

tulane.edu

So how long a tsunami lasts is sort of dependent on what you want to classify as a tsunami. There are going to be shock related waves for a long while, but most of them aren't going to be very significant in size.



To: tejek who wrote (215288)1/18/2005 11:16:12 AM
From: brian1501  Read Replies (1) | Respond to of 1573868
 
Here is an interesting account of the tsunami from people on sailboats in the bay. Sounds like several waves.

yachtaragorn.com

Brian