[mojitojoe]

Tidal wave as it suddenly settles out?
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:( Can that happen?

[Vendome]

i am trying to think of an example that is analogous. But, try to picture the Ocean with in a given area suddenly dropping. You would have a confluence of events.

The ocean floor gives away, the water hits the “New Floor”, at whatever depth that would be, a shock occurs and raises the water, just as a tsunami and who knows how far that would travel.

Here is a quick overview of tsunami causes. No need to read it, the pictures do a great job of explaining:

http://geology.com/articles/tsunami-geology.shtml