Slashdot Mirror

← Back to Stories (view on slashdot.org)

Inside the Active Volcano On Montserrat

Posted by kdawson on from the magma-sponge dept.

Roland Piquepaille writes "An international team of researchers has begun collecting imaging data on the Soufriere Hills Volcano in Montserrat, which has been erupting regularly since 1995. They're using the equivalent of a CAT scan to understand its internal structure and how and when it erupts. The experiment is dubbed SEA-CALIPSO and 'will use air guns and a string of sensors off the back of a research ship combined with sensors on land to try to image the magma chamber.' Early results are surprising. Quoting one of the leading scientists: 'The interesting thing is that much more magma is erupting than appears represented by the subsiding bowl. ... The magma volume in Montserrat eruptions is much larger than anyone would estimate from the surface deformation, because of the elastic storage of magma in what is effectively a huge magma sponge.'"

26 of 42 comments (clear)

  1. Montserrat Volcano Observatory by foobarb · · Score: 5, Informative

    http://www.mvo.ms/ Pictures and info about the volcano, official site.

    1. Re:Montserrat Volcano Observatory by SomeNoob · · Score: 3, Informative

      Direct link to Flickr set http://www.flickr.com/photos/mvo/

    2. Re:Montserrat Volcano Observatory by Fluffeh · · Score: 1

      *Dr Evil Voice*
      Well, I for one welcome our "Mol-ten Mag-ma" overlords!

      Do they have fricken lasers on their heads?
      *End Dr Evil Voice*

      --
      Moved to http://soylentnews.org/. You are invited to join us too!
  2. Live comments from an on-site reporter by this+great+guy · · Score: 4, Funny

    Reporter: The magma volume in Montserrat eruptions is much larger than anyone would estimate and... oh! look at that burst of lava ! I have never seen anyth- OMG I FEEL THE EARTH RUMBLIN-
    Studio anchor: ... Charles ? Do you hear me ? *turning to his co-anchor* Is he still with us ?

    1. Re:Live comments from an on-site reporter by upuv · · Score: 1

      Nothing to see here.
      Move along please.
      Move along.

      Go back to your homes!

  3. Note to those guys...Contact NERV. by DeusExCalamus · · Score: 3, Funny

    Better find an EVA unit complete with the D-Type armor, just in case there's an Angel lurking in the depths. :)

    --
    "...Sleep comes like a drug in God's country Sad eyes, crooked crosses in God's country..."
    1. Re:Note to those guys...Contact NERV. by gzipped_tar · · Score: 1

      No worry pal. We all know that only the Japanese volcanoes host Angels!

      --
      Colorless green Cthulhu waits dreaming furiously.
  4. Is it just me or.... by zappepcs · · Score: 4, Funny

    Does anyone else wish we could call the Enterprise back Earthside to do geologic surveys of this planet?

    Space travel is a good goal, but if you consider all the things that Star Trek presented as part of space travel, I'd be impressed if we started inventing them now to study THIS planet. Perhaps if we understood volcanoes better, we'd understand more about climate control for the planet and THAT would be a worthy goal. It's always good to hear there is money still for such research. Gives me a warm fuzzy feeling.

    --
    Support NYCountryLawyer RIAA vs People
  5. Move along people, nothing to see here by monserat · · Score: 1

    Alas, conservation of mass is maintained in volcanic eruptions.

  6. Been there.. by MoellerPlesset2 · · Score: 5, Interesting

    It's a beautiful place, beautiful volcano too. Odd fact of the kind they tell tourists: It once erupted and killed everyone except a guy who was in jail in an underground cell.

    1. Re:Been there.. by theredshoes · · Score: 1

      Well I don't want you to waste your points, asphyxiation is a side effect of a volcanic eruption. But if you think about it, who would live near a volcano without knowing that it could kill them? I am sure they are very aware that nature in this instance is deadly and climate change is real, not a gamble or an impossibility.

      Most people live either completely ignoring nature, trying to live in harmony with nature or they are even beholden to it and depend on their living and prosperity completely to survive. I think trying to live in harmony with it is probably best for most of society, if we want to survive. Like I said, I do not want to upset anyone on this board, so I don't think commenting any further is necessary about my views on nature, which I am sure no one will share here.

    2. Re:Been there.. by theredshoes · · Score: 1

      I also think all the people that ignore nature are those horrible people that go to McDonalds, LOL ehhh...

    3. Re:Been there.. by poetmatt · · Score: 2, Funny

      Explosive diarrhea is not the same as an erupting magma flow.

    4. Re:Been there.. by Nil000 · · Score: 5, Informative

      This particular incident was the 1902 eruption of St. Pelee on Martinique which killed 30,000 people in Saint-Pierre. What killed everyone in this case was not CO2 but a Nuee Ardente or pyroclastic flow. http://en.wikipedia.org/wiki/Saint-Pierre,_Martinique There was a survivor who was in the town jail. There used to be some items from the town in the Natural History museum in London, including half molten glasses and bottles.

    5. Re:Been there.. by pembo13 · · Score: 1

      Wrong island, you want Martinique, just south of Dominica.

      --
      "Thanks for all the money you paid to us. We've used it to buy off ISO among other things" -Microsoft
  7. No, that was Martinique by dtmos · · Score: 5, Informative

    Either you or the tour guide were very much mistaken. The famous story about the guy in the underground jail cell refers to the May 8, 1902 eruption of Mt. Pelée on Martinique, a different volcano on a different island.

    1. Re:No, that was Martinique by gomiam · · Score: 3, Insightful

      And he wasn't the only survivor, just the publicized one.

    2. Re:No, that was Martinique by Petronius+Arbiter · · Score: 1

      When I visited Martinique, the local version was that the alleged sole survivor of Pelee (a prisoner in an underground cell) might well have been a con artist.

      1. In the days before he was "rescued", the heat would have penetrated the cell and killed him.

      2. He spent the following years touring with PT Barnum's circus, advertised as the sole survivor.

      The theory is that he was outside the blast area, and entered the cell after the blast before the searchers.

      The sad story of St Pierre is a good example that, when the government tells you that there is nothing to fear, that it may be time to get the hell out of there. The volcano was threatening, people wanted to leave, the government said to stay.

  8. misleading title and analogy by i*i+1 · · Score: 2, Insightful

    The use of the CAT scan analogy is rather poor for several reasons. This study uses a typical ground and sea based seismic survey. There is a new move in the earth sciences to actually use portable MRIs (like this one [magritek - terranova]) to obtain images of the earth, so when I initially skimmed the article, I saw the CAT scan reference so many times that I thought they might be trying something similar.
    While seismology and cat scans share the basic purpose of remotely sensing the insides of an object and cat scans would be familiar to many readers, the analogy should have only been used once, in the body of the article. NOT in the title. A "CAT scan" DID NOT reveal "inner workings of volcano island." A seismic survey did.

    1. Re:misleading title and analogy by RockDoctor · · Score: 1

      A "CAT scan" DID NOT reveal "inner workings of volcano island." A seismic survey did.

      Quick check - what does the CAT in "CAT scan" mean?
      Computer
      Assisted (or Aided)
      Tomography

      CAT is a series of techniques where sensor imaging taken from a number of different angles are deconvolved to try to work out a parsimonious solution to the internal arrangement of parts that would generate the images actually seen.

      So, if the seismic survey(s) in question had been carried out along various different radii from the volcanic centre, or on different tangents (if they used for example a stationary geophone array and cruised a source past it on the other side of the volcano), then the description of the techniques as "Computer Assisted Tomography" would be quite appropriate. Unless, of course, the geophysicists in question had done all their data processing with an abacus. No, wait, an abacus is still a computer.

      FWIW, the "CAT" terminology in seismic processing was being accepted by the editors of 'Nature' over a decade ago.

      --
      Birds are not dinosaur descendants;birds are dinosaurs, for all useful meanings of "birds", "are" and "dinosaurs"
    2. Re:misleading title and analogy by i*i+1 · · Score: 1

      "the "CAT" terminology in seismic processing was being accepted by the editors of 'Nature' over a decade ago." Perhaps, I guess I've just never heard anyone use the term in discussions (though I've only been in the field for about 3 years now). So I do concede that "CAT" terminology may be appropriate, but the article uses "CAT scan," which has a distinctly medical connotation.

  9. Did they find any spammer carcasses? by davidwr · · Score: 1

    I'm just asking.

    --
    Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
  10. Re:Since a volcano is just a pressure cooker... by francium+de+neobie · · Score: 1

    But how can you guarantee the safety of workers when they're setting up the drill? That's no small drill and would need some time to set up properly, and while the workers are setting up the drill the volcano may explode.

  11. Re:Since a volcano is just a pressure cooker... by Red+Flayer · · Score: 1

    But how can you guarantee the safety of workers when they're setting up the drill? That's no small drill and would need some time to set up properly, and while the workers are setting up the drill the volcano may explode.

    Sigh. You're really just not cut out for this line of work. What is the meaning of a few lives lost when you're building your underground lair in the bowels of an active volcano to further your goal of world domination?

    1. Tame volcano.
    2. Build secret underground lair inside volcano.
    3. ???
    4. Profit.

    Note that the elusive step 3 is, in all likelihood, 'build doomsday device'. If you don't yet have plans for said doomsday device, or the means to force geniuses to produce one for you, I'd recommend against initiation of step 1.

    Seriously, when did supervillains become so unimaginative and weak? Safety of the workers is meaningless. If you're smart, you'll be making sure they all experience a massive "accident" just after completing their work, anyway.

    --
    "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
  12. Montserrat in this "The Police" video by Sam_In_The_Hills · · Score: 2, Informative

    The Police recorded their album "Ghost in the Machine" in a Montserrat studio.
    This video for "Every Little Thing She Does Is Magic" was shot there.
    http://www.youtube.com/watch?v=s5W2Vr6HU7s

    --
    Linux -- the Ultimate Windows Service Pack
  13. Re:Since a volcano is just a pressure cooker... by lysergic.acid · · Score: 2, Interesting

    i'm not a volcanologist, but this seems like it could be done by:

    1. using seismic surveys and land-based surface measurements to determine when the volcano approaching its eruptive phase and only work when there is minimal activity.
    2. use ground penetrating sonar or seismic survey data, locate the exact position of the magma chamber(s).
    3. drill towards the magma chamber at an angle so that you're not working directly above the volcanic system.
    4. use unmanned or remotely-operated drilling machines for the last mile of the tunnel.

    i mean, we have the technology to operate machinery remotely using video feeds and radio communication. and wasn't there a recent story about some deep sea drilling operation hitting a pocket of magma on accident? i know in 2005 a geothermal drilling site in Hawaii also came upon a magma chamber on accident. seems like if they could tunnel into a magma chamber on accident without problem, then they can certain do so safely with prior planning.

    the tunnel at Puna site was 1.5 miles deep, which is about half as deep as the ceiling of Montserrat's magma chamber; add to that another ~41% if you're tunneling in at a 45 degree angle, and it'll take quite a bit longer, but it's still feasible. i think the bigger probably might be keeping the magma flowing rather than cooling down and clogging the channel, but perhaps this won't be a problem for an active volcanic system.