eruption in Iceland

Discussion in 'Earth Science' started by christa, Apr 15, 2010.

  1. John99 Banned Banned

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    Beautiful picture Pasta. I heard that it erupted again, havent been keeping up with it though.
     
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  3. Pasta Registered Senior Member

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    Yea, it's almost desktop material

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  5. Cyperium I'm always me Valued Senior Member

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    lol @ desktop material, I agree!



    I don't mind this volcano, as long as it doesn't wake Katla...if so, I think we're in for trouble.

    Everytime in the past that this volcano has erupted it has awaken Katla (a much more explosive volcano nearby), then we are in for more ash, and flooding in iceland.

    They say that the ash could last as long as months or even years, with periods of varying intensity - if also Katla awakes then of course this situation is greatly enhanced.

    Katla has erupted in periods of 50 years...it was 70 years since the last eruption so scientists have been closely monitoring the volcano for 20 years. I don't know if this could mean that more pressure has been buildt up during those years? I hope not.
     
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  7. Trippy ALEA IACTA EST Staff Member

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    No, it isn't because a proven/provable verifiable and testable causal mechanism exists, which has already been spelled out to you in this thread, so hiding behind precedents amounts to little more than a logical fallacy.
     
  8. John99 Banned Banned

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    your serious?
     
  9. Trippy ALEA IACTA EST Staff Member

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    Which part, precisely, are you having trouble comprehending?
     
  10. John99 Banned Banned

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    Precedence, precisely.
     
  11. John99 Banned Banned

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    Actually that is only the beginning.
     
  12. Trippy ALEA IACTA EST Staff Member

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    Just because something has always happened in the past doesn't mean that the way it happens, or what causes it to happen in the future can not change.

    You sit around yapping about precedence, while you yourself ignore several things, including the fact that precedence doesn't preclude the influence of the proposed causal mechanism, and the fact that the same causal mechanism may have played a role in setting the precendence in the first place (the causal mechanism being changes in the weight of the ice sheet above the volcanoe resulting in the magma chamber being over pressured or under pressured).
     
  13. John99 Banned Banned

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    LOL. If a volcano is going to discharge (blow) snow and ice will not stop it. The heat from the volcano itself would melt the snow and if it is an explosive discharge it would explode with such force that tons of steel plate wouldn't stop it.
     
  14. Trippy ALEA IACTA EST Staff Member

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    You understand what stops a volcano from erupting while it's dormant right?
    The pressure created by the weightforce of the volcanoe and the earths crust exceed the pressure within the magma chamber.

    There are two ways of causing a volcanoe to erupt.

    One of these is by increasing the pressure within the magma chamber until it exceeds the pressure opposing it, at which point an eruption occurs.

    Another of these is by reducing the pressure opposing that of the magma.

    The 1980 eruption of Mt St Helens is the perfect example of a combination of these - yes, pressure had been building before hand, however, an earthquake caused a landslide that released just enough pressure to alow the eruption to occur.

    The same principle applies in the originally proposed hypothesis - that taking the earths crust out of isostatic equilibrium by removing ice sheets. You're objection might hold some weight if we were talking about say, a dacite cone with a few glaciers and a little snow on it's slope.

    But we're not.

    We're talking about a volcanoe that is (or rather was, until it started erupted) buried, in it's entirety, underneath a glacier.

    Hence the name.

    SUBGLACIAL eruption.
     
  15. MarkitScience www.MarkitScience.com Registered Senior Member

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    here are some more gloomy photos, i got these from The Big Picture:

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  16. MarkitScience www.MarkitScience.com Registered Senior Member

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    but my favorite has to be this satellite photo showing the volcano on the southwestern corner of iceland shooting ash down:

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  17. Bells Staff Member

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  18. christa Frankly, I don't give a dam! Valued Senior Member

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    i just love all these pics you all are finding!! And I'm amazed at how much this threat took off when I didnt even say 5 words...
     
  19. Asguard Kiss my dark side Valued Senior Member

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    what about, "you muma's so fat when they cremated her they had to stop flights in eroupe"
     
  20. Pasta Registered Senior Member

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  21. nietzschefan Thread Killer Valued Senior Member

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    It's a good thing Volcano's are exempt from Kyoto or wow Iceland would be financially fucked....er ummm ya like more fucked or something..

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  22. Trippy ALEA IACTA EST Staff Member

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  23. Trippy ALEA IACTA EST Staff Member

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