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Calderas and 'Super-Eruptions'

  1. Jul 23, 2016 #1

    Astronuc

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    Super-eruptions may give only a year’s warning before they blow
    http://news.vanderbilt.edu/2016/07/super-eruptions-may-give-only-a-years-warning-before-they-blow/
    In a paper entitled “The year leading to a supereruption” by Guilherme Gualda, associate professor of earth and environment sciences at Vanderbilt University, and Stephen Sutton at the University of Chicago published July 20 in the journal PLOS One, the scientists report the results of a new microscopic analysis of quartz crystals in pumice taken from the Bishop Tuff in eastern California, which is the site of the super-eruption that formed the Long Valley Caldera 760,000 years ago.

    Since pumice is formed from super-heated, highly pressurized rock that is violently ejected from a volcano, I assume it is produced in super-eruptions, since they are super-sized because of the gas in the magma.

    https://en.wikipedia.org/wiki/Phlegraean_Fields (Campi Flegrei)
    https://en.wikipedia.org/wiki/Taupo_Volcano
    https://en.wikipedia.org/wiki/1815_eruption_of_Mount_Tambora
    https://en.wikipedia.org/wiki/Toba_catastrophe_theory

    It would be interesting to review the compositions of the cited super-eruptions.
     
  2. jcsd
  3. Jul 29, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
     
  4. Dec 22, 2016 #3

    Astronuc

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  5. Dec 22, 2016 #4

    mfb

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    Instead of "giant asteroid 2016", we might get "giant volcano 2017"?
    Let's hope it will stay without a major eruption for a while.
     
  6. Dec 29, 2016 #5
    Is it like earthquakes? The longer you wait the bigger the bang?
     
  7. Dec 29, 2016 #6

    mfb

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    Not necessarily, but as far as I know that is the general trend. A few hundred years won't make a notable difference to the intensity, however, but a large difference to the question who will see the explosion.
     
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