Eruptions

Monday Musings

Posted by Erik Klemetti on July 27, 2009
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Again, sorry about the paucity of posts. Getting prepared to move 3/4 of the way across a continent will do that. Look for the next Volcano Profile, this time for Erebus in Antarctica, to be posted sometime in the next week or so.

We did get some news over the weekend of a large eruption at Shiveluch. The volcano in Kamchatka has been active all summer, but on Saturday it produced a 5,000 meter / ~23,000 foot ash plume. This was accompanied by 170 earthquakes and multiple avalanches, likely produced by the collapsing dome on the summit of the volcano. There is a little more information about the new network of webcams that are being set up to watch some of the most active Kamchatkan volcanoes, including Shiveluch (although the article frustrating labels the picture included as “erupting volcano,” without bothering to identify where in the world it is. Any ideas?)


Crater Lake, with Wizard Island, a post-caldera collapse basaltic scoria cone.

A few other bits of news:

  • Being a former NPS ranger at Crater Lake National Park (Oregon), I would say I am against this, but a company wants to stay flying helicopter tours around the caldera. One of the nicest things about the park is the tranquility of the area, and the idea of helicopters buzzing around the caldera every day does not appeal to me. Luckily, the FAA says it might take “years” to decide this issue. Hopefully, it withers on the vine.
  • We have some new images of Martian volcanism thanks to the Mars Express high resolution cameras. There appear to be abundant basaltic lava flows that stand out versus the dusty martian backdrop along the Ma’adim Vallis region of the planet.
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Comments

  1. #1 mike don
    July 27, 2009

    I have no idea about the ID of that volcano, but as the site is mostly about Russia, might it be one of the frequently-active Kamchatkan ones.. Karymsky or Kliuchev?

  2. #2 theroachman
    July 27, 2009

    The Crator Lake Mercery News link does not work. Registration only…

    Here is a link from the Times Standard

    http://www.times-standard.com/travel/ci_12923258

    Here is one from an Orgeon TV news.

    http://www.ktvz.com/Global/story.asp?S=10763631

  3. #3 Erik Klemetti
    July 27, 2009

    Roachman – Thanks for catching the problem with the link. I’ve fixed it to point to the Times Standard in the post.

  4. #4 damon hynes
    July 27, 2009

    Wizard Island basaltic? I always heard it was as dacitic as everything else on that volcano.

  5. #5 Erik Klemetti
    July 27, 2009

    Yup, Wizard Island, along with Merriam Cone (underwater) are both basaltic/basaltic andesite scoria cones that formed post-caldera collapse. The youngest feature in the caldera is the so-called Rhyodacite Dome, which is a little plug of rhyodacitic lava similar to previous Crater Lake material, but there sure in mafic lava in the caldera.

  6. #6 theroachman
    July 27, 2009

    No problem on the link Erik

    I am pretty sure the Russian Volcanos photo is Kamen and Klyuchevskoy. Klyuchevskoy being the one which is erupting in the photo of your link. I have seen that photo before but could not find it. So here is another.

    http://www.panoramio.com/photo/10987410

  7. #7 Bruce S.
    July 28, 2009

    Erik, that is something I’d love to hear more about. The evolution of the melt in magma chambers over time/eruptive volume. I have a very simplistic notion in my head of hot mafic material melting continental material over time, this getting erupted as rhyolite/andesite with the mafic material coming through (or not as the case may be) after the rhyolite is exhausted. The last Tarawera eruption was also basaltic if I remember rightly, in a rhyolite caldera setting. It appears to be a not unusual phenomenon. There are also some basaltic cinder cones in the Long Valley caldera.

    On another note, I stumbled across a piece on the interaction between volcanism and human history yesterday while hunting for stuff on New Britain.
    http://www.scu.edu.au/schools/esm/staff/pages/bboyd/bb_png.pdf
    which is tantalisingly brief (if anyone knows of some other research from this area I’d be really grateful!!) but I hadn’t realized quite how many major eruptions have occurred in this area in the last 10,000 years which also just happens to be one of the major centers of human development and trade in the same time frame.

  8. #8 Bruce S.
    July 28, 2009

    …and on yet another note, the seismic trace at Redoubt has started picking up (a little!) again over the last 12 hours.

  9. #9 Bruce S.
    July 28, 2009

    …and died down again.. Sorry! (probably just a storm)

  10. #10 cicely
    July 28, 2009

    Very nice picture! Your own work?

  11. #11 mjkbk
    July 29, 2009

    theroachman was correct. It’s Klyuchevskaya Sopka.

    The pic was credited to the University of Washington and can be found on its website, here:
    http://www.washington.edu/burkemuseum/collections/ichthyology/okhotskia/ikip/Proposal/introd.html.

  12. #12 Origuy
    July 29, 2009

    I followed the Ria Novosti link to see the article about Shivelech, then got distracted by the links to articles on pravda.ru: “Atlantis found under Antarctica” and “Russian fishermen catch squeaking alien and eat it”. Why is Scienceblogs not reporting on these earthshaking events?

  13. #13 theroachman
    July 29, 2009

    Field work at Mt Baker this week. Wasnt there some earthquake action there recently? Mt St Helens and others included in the field work for the next week. Have to keep a closer eye on the CVO updates page for the next month or two.

    http://volcano.wr.usgs.gov/cvo/current_updates.php

  14. #14 Erik Klemetti
    July 30, 2009

    Origuy – Yeah, sometimes the Russian news sources link to some, ahem, interesting articles.

    The Roachman – Haven’t heard of any Baker EQ concerns. What sort of field work are you doing up on those Cascade peaks anyway?

  15. #15 theroachman
    July 30, 2009

    Not my work Im in Denver. There was something about earthquakes at Mt Baker a few months back. Maybe March?

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