A question for the board.

[Guest]

If the Diego Garcia is only approximately 4 feet above sea level, and the tsunami caused 6 foot surges, then why was it not wiped out?

[SEAZSky]

Think about it -

Diego Garcia (the "armpit" of the Indian Ocean - per service personnel) - the original elevation "was" the 4' msl.

However, in the many years that the island(s) were
occupied by allied forces - including the USA, considerable
contruction has occurred, with hardened piers, buildings,
major installations, and built-up sea protections, etc.

Now, 10 + foot sea wave(s) would do little damage to
the island(s).

Diego Garcia is a major strategic/tactical base for the
military forces of several nations, including the USA.

[SouthernWx]

One must also consider the depth and slope of the Indian Ocean north and east of Diego Garcia. Just as with a hurricane produced storm surge, if the slope offshore is steep and very deep, the surge or tsunami height will be much less than if it encounters a shallow slope in shallow waters.

PW

[Guest]

Diego Garcia is protected by the tsunami by a coral reef that surrounds the island.
I read this in a associated press article.