More info on super volcano for our discussion

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Matt-hurricanewatcher

More info on super volcano for our discussion

#1 Postby Matt-hurricanewatcher » Tue Apr 18, 2006 10:51 pm

What happened during the last eruption of a super volcano?
The last eruption of a super volcano was in Toba, Sumatra, 75,000 years ago. It had 10,000 times the explosive force of Mount St. Helens and changed life on Earth forever. Thousands of cubic kilometres of ash was thrown into the atmosphere - so much that it blocked out light from the sun all over the world. 2,500 miles away 35 centimetres of ash coated the ground. Global temperatures plummeted by 21 degrees. The rain would have been so poisoned by the gasses that it would have turned black and strongly acidic. Man was pushed to the edge of extinction, the population forced down to just a couple of thousand. Three quarters of all plants in the northern hemisphere were killed.


http://armageddononline.tripod.com/volcano.htm


So yes it would kill off most of the human race. In really would today, we are so weak and sorry that we almost kill our selfs. Sad.
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Coredesat

#2 Postby Coredesat » Tue Apr 18, 2006 11:08 pm

What does this have to do with tropical weather? This thread needs to be moved.
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AussieMark
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#3 Postby AussieMark » Thu Apr 20, 2006 12:47 am

Volcanic Explosivity Index: 8
Classification: Plinian/Ultra-Plinian
Description: mega-colossal
Plume: > 25 km
Ejecta volume: > 1000 km³

Examples:

La Garita Caldera, Colorado, United States (27.8 Million years ago

Yellowstone Caldera, Wyoming, United States (2,200,000 years ago)

Yellowstone Caldera, Wyoming, United States (640,000 years ago)

Lake Toba, Sumatra, Indonesia (73,000 years ago


Volcanic Explosivity Index: 7
Classification: Plinian/Ultra-Plinian
Description: super-colossal
Plume: > 25 km
Ejecta volume: > 100 km³

Examples:

Long Valley Caldera, California, United States - 760,000 years ago

Crater Lake, Oregon, United States - 4900 BC

Santorini (Thera), Greece - 1640 BC

Taupo, New Zealand - 181 AD

Tambora, Sumbawa, Indonesia - 1815
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