Dive profiles from tsunami

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Chris Quinn - 30 Dec 2004 16:29 GMT

I have seen several reports in the papers of divers who were underwater
when the tsunami passed, who then surfaced to find their resorts
obliterated. It would be interesting from a scientific point of view to
see the dive profiles from their computers, assuming the sampling frequency
of the computers was high enough to record the waves passing overhead.

Chris Q

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Stimp - 30 Dec 2004 16:44 GMT

> I have seen several reports in the papers of divers who were underwater
> when the tsunami passed, who then surfaced to find their resorts
> obliterated. It would be interesting from a scientific point of view to
> see the dive profiles from their computers, assuming the sampling frequency
> of the computers was high enough to record the waves passing overhead.

didn't the wave 'pulse' travel along the sea-bottom as opposed to a wave
overhead?

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Mike Ross - 30 Dec 2004 16:53 GMT

>I have seen several reports in the papers of divers who were underwater
>when the tsunami passed, who then surfaced to find their resorts
>obliterated. It would be interesting from a scientific point of view to
>see the dive profiles from their computers, assuming the sampling frequency
>of the computers was high enough to record the waves passing overhead.

Very little to see, I suspect. In open water, a tsunami is normally
nothing more than a slight to heavy swell.

In shallow near-shore water, the computer would record a change from a
comfortable depth to the top of a tree, at something considerably
exceeding any recommended ascent rate.

Mike

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