Eruptions

Tuesday Tidbits

i-f297b736d6c5c805b63ab54d91b230dc-Redoubt-Volcano-steaming-w-.jpg

Redoubt emitting a large steam plume in April 2009. Image courtesy of Calvin Hall.

A few snippets from the world of volcanoes:

  • The current eruptive cycle at Galeras continues to go strong. Officials with INGEOMINAS, the Colombian Geology Survey, believe the volcano will erupt again in the next few “days to weeks”. The volcano last erupted a few weeks ago (in spanish) and caused quite a bit of panic in the city of Pasto at the foot of the volcano. An Orange Alert has been issued (in spanish) for the volcano.
  • Another volcano have is on the verge of a larger eruption is Nyiragongo in the DR of the Congo. Reports of “by day, the air in the city is thick with volcanic dust. By night …the red glow of burning lava trickling out of the summit of the nearest volcano [Nyiragongo]” Additionally, one of the scientists at the Goma Volcano Observatory reports that “significantly increased temperatures had been recorded around Mount Nyiragongo recently and a larger than usual cloud of volcanic dust was being thrown into the skies“. Interestingly, he also mentions that Nymuragira, not Nyiragongo, is the volcano they expect to erupt soon.
  • Not much new to report on the Redoubt front. The dome collapse has yet to occur and seismicity at the volcano has tailed off compared to last week. Still, always a good idea to take a peak at the webcams.
  • The erratic behavior of Llaima (in spanish) has government officials in Chile on edge. There is still an active lava flow emanating from the volcano, plenty of volcanic gas and ash emissions – mostly in the form of orange/black plumes that reach a few hundred meters and constant low-level seismicity.

Comments

  1. #1 David Emery
    May 12, 2009

    I know very little about volcanos in Africa. What’s the rationale/explanation for a volcano in the Congo? Hot spot underneath? Presumably this isn’t one of those coastline subduction zone volcanos…

  2. #2 David Emery
    May 12, 2009

    I know very little about volcanos in Africa. What’s the rationale/explanation for a volcano in the Congo? Hot spot underneath? Presumably this isn’t one of those coastline subduction zone volcanos…

  3. #3 volcanophile
    May 12, 2009

    Nyragongo lies on an opening rift-zone like its eastern counterparts Oldonyo Lengai anfd Kilimandjaro.

    The African continent is beginning to crack apart into several microplates. 2OO million years into the future, a new ocean will be opening into what is currently Great Rift Valley.

    About LLaima, hmm.. kinda reminds me of something.

    Mt Etna did exactly that in 1979. In the beginning of August 1979, the Bocca Nuova was violently erupting, Vulcanian-style, while lava was flowing down the flanks into Valle del Bove.

    The explosive activity abruptly stopped when part of the crater wall collapsed into the vent and sealed it shut. As gases had nowhere to go, pressure kept building up and up while tourists were allowed again to climb to the summit, because the eruption was thought to be over .

    On 12 september 1979, the plug suddenly gave way and everything blew up. 9 people, who were on the crater rim taking pictures, were instantly killed, and several more were injured.

    So don’t believe it’s over at Llaima yet. We might be waiting for a big de-corking.

  4. #4 Erik Klemetti
    May 12, 2009

    Volcanophile – Thanks for the info on Nyiragongo. And double thanks for the comparison of Etna to Llaima. I’m sure this thought has gone through the heads of the geologists in the SERNAGEOMIN (at least I hope it ha). Definitely a system to watch carefully.

  5. #5 volcanophile
    May 12, 2009

    Etna and Llaima are in fact quite similar.

    They’re both basaltic stratovolcanoes, and they essentially behave in the same way.

    “Uncorking” explosions (the french term is “débourrage”, I haven’t found any English equivalent) are a permanent threat on this type of volcanoes.

    As parts of the crater wall collapse on top of the vent, gases can no longer escape and the resulting pressure build-up can make really bad things happen..

    This is especially treacherous, because since there is no gas venting, there is no unusual fumarolic activity before the big blow-up..

    Etna did that again in 1986.

  6. #6 Richard Smith
    May 12, 2009

    The volcano last erupted a few weeks ago (in spanish)

    What does a volcano erupting in Spanish sound like?

  7. #7 volcanophile
    May 12, 2009

    It would sound a bit like you if you ate half a pound of habanero chili peppers…

  8. #8 Ramiro Rowse
    November 20, 2010

    We’re officially 24 hrs from someone telling a Santiago nightclub bouncer, “yeah, the thing is, I’m one of the miners.”

  9. #9 Abbie Jeannotte
    November 20, 2010

    The way a person pronounces ‘hummus’ pretty much tells me everything I need to know about them.

  10. #10 Medicare Supplement Plans
    November 21, 2010

    Great article. I wish more people could learn to disagree respectfully. It would make for more interesting discussions.

  11. #11 Interest Rates on Home Loans
    November 23, 2010

    Hi, or perhaps which is out of subject matter also well, as a former doing research shut to your website also it seems to be looking in truth simply great. I will be constructing a progressive blogging plus experiencing financial distress recover look really good, each my wife and i put your hands on whatever the mess it up. How you can solid have been in which develop your blog post? Could another woman much like me without using a training do this, and therefore contribute child post to number of pages not wrecking the actual as well as?

  12. #12 ESP Horizon
    November 23, 2010

    Not bad. Some more detail would be even better.

  13. #13 Hello Kitty Costume
    November 24, 2010

    What you said seems sensible. However, think about this, imagine if you included a little bit more? I am talking about, I do not tend to tell you ways to run your site, but if you added more stuff which can certainly get peoples particular attention? Just simply as a online video or maybe a picture or maybe 2 to have people excited about what you mentioned.

  14. #14 alpha lipoic acid
    November 29, 2010

    Your concept coincides with mine.and I think it’s far better.

  15. #15 bridging finance
    December 3, 2010

    I agree with you I’d explain it to you, but your brain would explode.

  16. #16 futon sofas
    December 23, 2010

    Hey from down below..We’ve been searching as a result of a few of your pages and specificlly like this one particular. In the begining I e book marked your front page simply because I saw a thing I liked. It is now my second trip again to determine what different you had on your site and i just wanted to say that you just have performed some very cool post.

The site is currently under maintenance and will be back shortly. New comments have been disabled during this time, please check back soon.