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Subject: Isle of Man
Posted Apr 19, 2010 by
paulh. I'm Lord and master of a fool's Taj Mahal
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If a really big volcano were to blow (Yellowstone, anyone?), we might face a full *year* of ash falling from the sky, plus unusual darkness even at noon. There was such an eruption in 535 A.D., and the famine that ensued killed 100,000 people in Constantinople. In the early aftermath, the sky was dark even at noon.

Yellowstone would wipe a huge part of the U.S. and Canada off the map. It would affect areas as far away as Texas.

The two neighboring volcanoes in Iceland do varying amounts of damage. In the early 1780s, they did a nasty job on the world's climate, but as we know, things recovered.

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Subject: Isle of Man
Posted Apr 19, 2010 by
Devonseaglass
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The majority of stuff expelled from volcanoes is not ash at all, but water vapour in the form of steam and a lot of CO2. http://wattsupwiththat.com/2010/04/18/volcanoes-and-water/

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Subject: Isle of Man
Posted Apr 19, 2010 by Online Now
Gnomon does it all by himself
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When the Laki volcano erupted in Iceland in 1783, one fifth of the population were killed by toxic fumes.

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Subject: Isle of Man
Posted Apr 19, 2010 by
Devonseaglass
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What was the population of Iceland in 1783? erm

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Subject: Isle of Man
Posted Apr 19, 2010 by Online Now
Gnomon does it all by himself
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Not a lot.

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Subject: Isle of Man
Posted Apr 19, 2010 by Online Now
Gnomon does it all by himself
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After the eruption and subsequent famine, it was about 70,000.

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Subject: Isle of Man
Posted Apr 19, 2010 by
paulh. I'm Lord and master of a fool's Taj Mahal
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Yes, Gnomon, the 1783 eruption was the one I was talking about. A lot of people were unable to evacuate Vesuvius in the first century in time--basically you need to go at least 20 miles away from an eruption in order to be safe, and in those days the fastest mode of transport was horse. Unless they started early enough, they wouldn't escape once it became obvious that there was great danger in staying. sadface

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