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Krakatoa was a fairly small volcanic island (the caldera was about 7
miles across) as volcanic islands go.  When it erupted in 1883 it made a
rather large noise and effected rather a large area. 
-from http://pharos.bu.edu/Egypt/Wonders/Natural/krakatoa.html
"So violent was the eruption that volcanic ash and debris reached as far
west as Madagascar. Tidal waves resulted in the destruction of more than
150 villages, and were felt in France and England. In Australia,
hundreds of kilometers away from the site, the explosion was heard. "

When Mt St. Helens' erupted ash was deposited across a 4 state swathe
and we had red sunsets and haze due to the ash in the atmosphere.

When Mt Penatubo erupted in 1991 (in the Philippines) we here in
California again had haze and red sunsets for weeks after again.

A single tsunami just wiped out most of New Guinea's coastal population.

I have no difficulty imagining some natural disaster of an even larger
magnitude occuring......

-Betty Cunningham

Tetanurae@aol.com wrote:
> Another thing I would like to point out to everyone is the size of the rock
> that fell from the sky.  Get a globe, your standard American 12" diameter
> globe will be fine for my example.  I have heard estimates of the size of this
> rock from between 6 and 10 miles across.  That means that with the 12" globe
> the rock that killed the dinosaurs would be between 1/110 and 1/66 of an
> inch!!!  This is bordering on microscopic.
> And this tiny partical of dust is supposed to kick up enough dust and rock to
> cloud up the atmosphere, block out the sun, then bake the earth enough to
> cause massive firestorms!?  Give me a break!  Am the only one that thinks that
> this is just slightly absurd?