From: Ryan Gill (rmgill@mindspring.com)
Date: Thu Feb 03 2005 - 07:04:28 PST
At 6:21 AM -0600 2/3/05, John Doherty wrote:
>Didn't one of the news services say something about the sea floor being
>elevated after the tsunami? Seem to recall that an undersea mountain
>appeared overnight in a spot that was previously very deep. Most of the sea
>charts were going to have to be redone for a large area of the ocean.
>
>Did anybody say where the sub ran aground?
It was south of Guam. Pretty much outside the zone of effect of the
tsunami. The Sea Mount was uncharted. Given how little charting
(think scan resolution) that has been done at depth, it's surprising
this doesn't happen more often. In this case, everything points to
the mount just not being on the charts because it was too skinny to
be picked up by the low resolution scans done in that area.
Diego Garcia's lack of damage is due to the fact that it's a volcanic
atoll. The rock comes up very steeply from the ocean floor there
which means that the tsunami wave which has a very long period
doesn't have a gentle slope to magnify it's effects as it reaches the
shore. Think of it as a whip. At the end of the whip (at the end of a
long gradual slope) you're going to get a nice hard *crack* as
someone whips it. At the middle however, you don't see anything but a
movement of the whip with no *crack* or sound.
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