Re: Merry Christmas & Boxing Day Tsunami Anniversary

David Oberman <doberman@xxxxxxxxxxxxxxxxxx> wrote in
news:2v6cr1lcacsto0leoj14sd93rq57vqlmto@xxxxxxx:

> Skywise <into@xxxxxxxxxxxxxxxxxxxx> wrote:
>
>>As for 2, if the answer isn't a, then it's gotta be c. I figured
>>it would be a deep water wave since it involves the whole water
>>column, even way out in open ocean. Saying it's a shallow water
>>wave implies the term 'tsunami' only applies to the part that
>>rises up on itself due to the shallowing of the ocean bottom as
>>it nears the shore. But isn't it still a 'tsunami' wave even way
>>out in deep water where it may only be a few centimeters tall at
>>best?
>
> The distinction between "deep-water wave" & "shallow-water wave" is a
> little misleading in its nomenclature: it doesn't have anything to do
> with the absolute depth of the water, but is a description of the
> ratio of the water depth to the wavelength.
>
> So tsunamis & tides are shallow-water waves because in both cases the
> wavelength is more than twice what the water depth is.

Ahh...learn something new every day. Did not know the definition.

Thanks for the quiz, btw. It was fun. I did better than I thought
as there were a few questions towards the end I really had to think
about.

Brian
--
http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism
Seismic FAQ: http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html
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Sed quis custodiet ipsos Custodes?
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