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Krakatoa - and the tsunami that was created when it blew

 
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Melanie



Joined: 25 Oct 2004
Posts: 26
Location: Torbay

PostPosted: Mon Nov 07, 2005 5:55 am    Post subject: Krakatoa - and the tsunami that was created when it blew Reply with quote

Here's an article by Dr Duncan L Copp in January 2005



Krakatoa represents the most violent volcanic eruption in recent human history, resulting in an estimated death toll

of 36,000. Though Krakatoa was uninhabited, the adjacent islands felt the force of the eruption, with devastating consequences.

The greatest loss of life came

not from the volcano itself but giant tsunamis up to 40 metres high, generated when the flanks of the volcano slid into the sea ...............




To see the rest of the article on the Channel 4 nature site, click here:


http://www.channel4.com/science/microsites/S/science/nature/krakatoa.html

Mel
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Steve



Joined: 31 Oct 2004
Posts: 14
Location: Plymouth

PostPosted: Wed Nov 09, 2005 5:16 am    Post subject: Reply with quote

A few exerts from a small part of the geology webpage (listed below)

On Monday,

August 27 (1883), this frightening display of volcanic power would culminate in a series of at least four stupendous eruptions that began at 5:30 a.m., climaxing in a

colossal blast that literally blew Krakatau apart....
.... About 23 square kilometers of the island.... subsided into a caldera about 6 km across. [from an original ground

height of 450m to a depth of 250m below sealevel] = rather large tsunami.
.... These tsunami stripped away all vegetation, washed ~3000 people out to sea, and

destroyed all signs of human occupation.

This geological educational page listed below has info on:
*plate techtonics
*sequence of events
*stories told

by crew of ship that made it over the huge oncoming surges by steaming towards them. "Suddenly we saw a gigantic wave of prodigious height advancing

toward the seashore with considerable speed. Immediately, the crew . . ."


click here to see the page:


http://www.geology.sdsu.edu/how_volcanoes_work/Krakatau.html

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