Nachikinsky – Why is she so quiet?

Is she biding her time, or have plate movements reduced the supply of magma?

Image 1: Nachikinsky from Google Earth.

Image 1: Nachikinsky from Google Earth.

I came across this volcano while rummaging around the internet to research Tolbachik.  A quick Google around for Nachikinsky does not find much; and, she is not listed in GVP. Most of this post is based on a comprehensive study carried out by Portnyagin et al [1] on the primitive lavas of the Central Kamchatka Depression (CKD).

Tectonic Setting

Nachikinsky is a group of cinder cones at the northern end of the CKD, close to some of the world’s most active volcanoes.  It is the tectonic setting which makes this volcano interesting (at least to me).

The dominant tectonic activity in the region is the subduction of the Pacific Plate under the Okhotsk Plate.  To the north of the Aleutian-Kamchatkan triple junction, the plate boundary changes from convergent in the south to strike slip motion in the north.  A system of fault zones accommodates the change in plate motions. North of the fault zones, the subduction zone may be extinct.

Nachikinsky is a near the Alpha Fault Zone (FZ) at the boundary between the Okhotsk Plate, Komandorsky Plate and the Pacific Plate.

Image 2: Map from Google Satellite; approximate location of faults added by the author.

Image 2: Map from Google Satellite; approximate location of faults added by the author.

Lavas

According to Portnyagin et al [1], in the Pliocene / early Quaternary, Nachikinsky produced low Fe, medium to low K pyroxene and amphibole andesites and dacites. The most recent late Pleistocene rocks are moderate Fe, high to medium K olivine-plagioclase-pyroxene trachybasalts and basaltic trachyandesites.  The primitive magmas have varied compositions: early Quaternary rocks are Si rich, and Fe, Ca and Ti poor; whereas, late Pleistocene rocks have relatively low Si, high Ti and High K trachybasaltic compositions.  The latter are unlike other primitive magmas in CKD, indicating that the mechanism for magma generation differs from southern CKD volcanoes.  Nachikinsky’s lavas have negligible slab derived components.

Mantle Tomography

Levin et al,2002 [2] studies of mantle tomography suggest that neither the Pacific Plate nor the Komandorsky Plate underlies Nachikinsky.  A section of the Komandorsky Plate may have broken off during the Cenezoic sinking into the mantle and triggering a temporary mantle upwelling to fill in the void. (Levin et Al, 2002; Portnyagin et al, 2005a).

Image 3:  Different sources of magma for the volcanoes of the northern CKD based on Fig 18 from Partnyagin et al [1].  Not to scale.

Image 3: Different sources of magma for the volcanoes of the northern CKD based on Fig 18 from Partnyagin et al [1]. Not to scale.

However, Jiang et al [3] did not find evidence of a broken off plate segment from their studies to determine the structure of the mantle at the Pacific slab edge under Kachatka.  They propose that the mantle flows round the edges of the Pacific Plate in a tear zone.   The flows may be something like this (assuming that I have the location of Shisheisky volcano correct from Bryant et al [4]):

Image 4:  Possible mantle flow round the edge of the Pacific slab under Kamchatka.   Map from Google Satellite, narrative author’s own.

Image 4: Possible mantle flow round the edge of the Pacific slab under Kamchatka. Map from Google Satellite, narrative author’s own.

Recent Earthquakes

From EMSC [5], we can see that the area has not had many earthquakes greater than 4.5; only a handful have been recorded near Nachikinsky in the past five years, one of which had a magnitude of 6.1.  Beachballs for the area show that there is still some residual movement north of the Aleutian FZ:

Image 5: 6.1 M NEAR EAST COAST OF KAMCHATKA – 2012-06-24 03:15:01 UTC from EMSC showing earthquake locations (beachballs) for the area.”

KarenZ

23/06/2013

References & Sources:
1. Portnyagin et al: “Geochemistry of Primitive Lavas of the Central Kamchatka Depression: Magma Generation at the edge of the Pacific Plate”, Maxim Portnyagin, Ilya Bindeman, Kaj Hoernle and Folkmar Hauff, Geophysical Monograph 172, volcanism and subduction: the Kamchatka region.  American Geophysical Union, Washington, 199-239, 2007.
2. Levin et al: “Seismic Evidence for Catastrophic Slab Loss beneath Kamchatka”, V. Levin, N. Shapiro, J. Park and M. Ritzwoller, Nature, 418, 763-767, 2002.
3. Jiang et al: “Seismic Tomography of the Pacific Slab Edge under Kamchatka”, Guoming Jiang, Dapeng Zhao and Guibin Zhang, Tectonophysics 465 (2009), 190-203.
4. Bryant et al: “High Mg# Andesitic Lavas of the Shisheisky Complex, Northern Kamchatka: Implications for Primitive Calc-alkaline Magmatism”, J.A. Bryant, G.M. Yogodzonski, T.G. Churikova, Contributions to Mineralogy and Petroloy, Volume 161, Issue 5, 791 – 810.
5. EMSC: http://www.emsc-csem.org/Earthquake/

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176 thoughts on “Nachikinsky – Why is she so quiet?

  1. Um … references?

    References & Sources:
    1. Portnyagin et al: “Geochemistry of Primitive Lavas of the Central Kamchatka Depression: Magma Generation at the edge of the Pacific Plate”, Maxim Portnyagin, Ilya Bindeman, Kaj Hoernle and Folkmar Hauff, Geophysical Monograph 172, volcanism and subduction: the Kamchatka region. American Geophysical Union, Washington, 199-239, 2007.
    2. Levin et al: “Seismic Evidence for Catastrophic Slab Loss beneath Kamchatka”, V. Levin, N. Shapiro, J. Park and M. Ritzwoller, Nature, 418, 763-767, 2002.
    3. Jiang et al: “Seismic Tomography of the Pacific Slab Edge under Kamchatka”, Guoming Jiang, Dapeng Zhao and Guibin Zhang, Tectonophysics 465 (2009), 190-203.
    4. Bryant et al: “High Mg# Andesitic Lavas of the Shisheisky Complex, Northern Kamchatka: Implications for Primitive Calc-alkaline Magmatism”, J.A. Bryant, G.M. Yogodzonski, T.G. Churikova, Contributions to Mineralogy and Petroloy, Volume 161, Issue 5, 791 – 810.
    5. EMSC: http://www.emsc-csem.org/Earthquake/

  2. Nice article Karen. Could you give some explanation on the beach balls please? I remember there was some exchange at a time, but I think a reup would be useful….

  3. Getting bigger…
    Sunday
    23.06.2013 17:46:05 64.603 -17.191 15.5 km 0.9 99.0 16.6 km ESE of Bárðarbunga
    Sunday
    23.06.2013 17:04:06 64.597 -17.154 20.9 km 2.1 99.0 18.5 km ESE of Bárðarbunga

    • This was more of a pressure quake. I did not see it as a long period magmatic quake, it looked more like a deep brittle quake and you only get those at tremendous pressure at that depth since things are half melted down there.

        • No biggie. Esoteric interests tend to intimidate people.

          Try imparting some of the awe at what we discuss here to the average person. When their eyes gloss over. it’s time to stop. On a plus side, when it’s hurricane season, I know when to freak out or when to get another beer. And it’s not due to what some bobble head on TV has to say. My wife gets upset when I belittle the comments by the Bobble heads, but she knows that I have more than a clue about what I am talking about.

          • Most people don’t want to know that their favourite holiday island is a (restless) volcano 😕 But I did interest someone enough to visit the Canaries (probably to get away 😉 ).

  4. Slab suction: Local convection currents exert a downward frictional pull on plates in subduction zones at ocean trenches. Slab suction may occur in a geodynamic setting wherein basal tractions continue to act on the plate as it dives into the mantle (although perhaps to a greater extent acting on both the under and upper side of the slab).

    Edit: Released from the Dungeons by a friendly Dragon!

  5. Even more quakes now.

    Sunday
    23.06.2013 21:41:01 64.594 -17.139 7.8 km 0.5 99.0 19.2 km ESE of Bárðarbunga
    Sunday
    23.06.2013 21:39:38 64.520 -17.218 17.9 km 1.0 99.0 13.1 km NNE of Grímsfjall
    Sunday
    23.06.2013 21:39:31 64.588 -17.185 17.0 km 1.0 99.0 17.4 km ESE of Bárðarbunga

    • These are very small, it needs much harder quakes before anything can penetrate

      • Yepp, and to my knowledge we have only had one quake above 2M so far… The other ones have been fairly piddly.
        But there is a slight twist to the saga. The 2.1M we saw a few hours ago was a brittle quake due to high pressure, that is short in duration, like a gunshot. The other ones have been long duration magmatic events and those just do not compute well into the M scale (or any other scale) that is automatically generated. We saw how the guys at IMO had to work them.

        But, you are of course correct, we need to se many more and bigger quakes before the duck rears it head up over the surface.

        • Yes, and also that there are some meters of Ice on top of it, so we are some time away from “Manuel The Duck” to be visible to naked eye, but that of course can change in a few hours.

          • I think it will take a bit more for Manuel to form than a few hours. I am feeling oddly psychic here… I think we will soon have a deep quake at Dreki.

            Edit: And with that I will now go and dream about Manuel the Duck and all other sorts of chicks in Iceland (volcanic only).

  6. Oh where oh where
    Has the Kula plate gone?
    Oh where oh where can it be?
    With it’s slab pushed down
    under the Aleutian chain,
    it drifts deep under the
    Komandorskaya Basin…

    • Before anyone gets bent out of shape, you try rhyming Komandorskaya Basin.

      All that remains of the Kula is a shard of a spreading center that it shared with the Pacific plate. I can’t help but wonder if the Shirshov Ridge and Bowers Ridge may be related to the subduction of the northern extent of the Kula-Pacific Ridge (old spreading center)

      • The honest answer that I don’t know. My guess is that they are independent spreading ridges because they are on different plates.

      • I agree about them being different plates… but as the spreading center itself went under. All that fresh decompression melt went down with it.

        It is likely to be quite chaotic under the plate to the north, The existing subduction zones have really steep dropping slabs (not forcing up the overriding plate) and as the remaining pieces of what went down tumble to the slab graveyard, the turbulence must be unreal.

        • Surprised that there is not more evidence of volcanic activity there. Perhaps it is hidden under sediment or the bathymetry is not detailed enough 😕

          • The steep angle of decent for the slab might make any magma produced to be dragged down in an inverted drag-column? Ie, it gets pulled down faster than it can go up?

        • Works for some females on weekens (and some “erupt” after drink too much) I guess, but I think this not be sub-surface. Turn the fan on again likely will do the trick 😉
          Or if of Hydro-Geysir origin, put in more soap!

          • Screw the soap, go for something stupendous… drop in a five gallon tub of AFFF concentrate. That will keep people entertained for hours!

            I was standing deck watch in the shipyards and I had a snowman walk across the brow and show his ID card. It was one of our bosuns coverd from head to tow with AFFF foam. They were doing a test of a foam nozzle and he had fallen into the tank.

            Under the right conditions, this stuff, which can appear to be ragged chunks of Styrofoam, float around on air currents.

            Another Foam test.

  7. From Erik’s blog (older post) – http://www.youtube.com/watch?feature=player_embedded&v=3ATDHCtaMBs

    I watched this small Popocatapetl video Erik posted on his website and something caught my eye – If you’ll notice, approximately half way through the eruption, there is an area closer to the base of the volcano that vents steam and ash on it’s own. I’m not sure what (if anything) this would signify, but it’s noteworthy that there are conduits and fumaroles towards the base of the edifice.

    Like I said, I don’t know if this poses any significance, but it’s at least something interesting I hadn’t seen before.

    • My gut feel is that this is via existing ring faults. In the future, if Popo ever goes nasty, or if the caldera empties out, this could mark the rough boundary for the follow on caldera.

      And natch, the caveat: Not a Geologist, Volcanologist, Gynocologist, Ornithologist, or purveyor of fine silk, but I have made hard cider.

      Now… if I am correct, and had the summit been more resilient, that would have been the entire mass of the mountain being lifted up like a rattling lid on a boiling pot on the stove. Might even be a failed monster eruption that you spotted… or the first in a set of events that eventually unstick the roof as the rest of the seam is loosened. Only time will tell.


      Alternative version. Gas may have been released along old radial dike paths.


      What would be really cool, would be if they did an ISAR comparison of the edifice post eruption with the before eruption edifice. That would settle the matter once and for all.

    • Interesting. I have seen a much smaller version on Sakura-jima near the base of the Showa Crater – nothing as clear as Popo. I had thought this to be gas / steam from small fissures.

      • My take on it is that they are smoking/steaming chunks blown out during the explosion. Remember that the video is on fast-forward.
        If you look closely just after the explosion you can see some chunks rolling down the slope and you can also see a couple of bombs impacting lower down. These are all smoking, and carry on smoking when they come to rest.

        • Oh, forgot my manners. Nice post Karen! – a very interesting little corner of the world up there around the triple junction.

          • Thank you. now pondering a non-Icelandic, non-Kamchatkan, not El Hierro volcano to research. Could take a while 😉

            • Haha! Well there’s certainly a whole big world out there, although personally I would be most happy if we talked about nothing but Kamchatka forever.
              Mind you, Iceland might feel a bit ‘dumped’ if we don’t have at least one post a week about it.
              PS I’m only joking, before anyone starts slinging lava bombs in my direction 😉

            • Don’t worry UKViggen, there is enough forum for all the worlds volcanoes 🙂

              I’ve just gotten mentally stuck on rifting and fissures and basalts.. I will eventually get bored and do something rother unwholesome with something explosive somewhere that is totally unrelated to the above mentioned forms of volcanoes in well known places 😉

      • If you watch the full video, the steam emitted is too much, and too constant. It’s also set up in a linear fashion where it would seem to be exposing a fracture or dike system.

        It is true that sometimes rocks and pumice can cause steam, but not this much, and not at that rate. If that were the case, you would see similar features closer to the summit where the larger ejecta is concentrated around. The fact that you don’t see steam coming until this very area on the bottom is a pretty sure sign it’s not from a lavabomb or anything similar.

    • Hmmmm…my original thought (and still is watching this again a few times) is that they are significantly big lava bombs setting light to vegetation. If you look closely after the original explosion, streaks of smoke / ash hurtle down the sides of the cone – presumably large lava bombs – and these end up in similar white smokes lower down. Anyhow, that was my take. If it is as Geolurking says, then Popo’s future could be scary.

  8. And in celebration of Geoloco poking his head up into forum.

    Don’t be running away dude, you are part of the sanity check for some of my wild arsed ideas. If left to my own devices I can come up with all encompassing ideas of how things work. They would likely be wrong, but they would be highly entertaining.

  9. Probably nothing big to see here, but Mammoth mountain has been seeing a bit of an energetic swarm recently. For those who don’t know, mammoth mountain is a volcano associated with the Long Valley Caldera. I’m not sure if it’s a resurgent dome or a separate volcanic system adjacent to Long Valley, but it’s at least interesting to keep note of.

    3.0
    4km E of Mammoth Lakes, California
    2013-06-17 22:02:11 UTC-04:005.3 km
    2.8
    4km ESE of Mammoth Lakes, California
    2013-06-17 22:38:11 UTC-04:007.7 km
    2.7
    12km NNE of Mammoth Lakes, California
    2013-06-23 07:15:41 UTC-04:008.3 km
    2.5
    10km E of Mammoth Lakes, California
    2013-06-23 07:42:15 UTC-04:008.4 km
    2.5
    3km ESE of Mammoth Lakes, California
    2013-06-17 21:39:34 UTC-04:007.7 km
    2.5
    4km ESE of Mammoth Lakes, California
    2013-06-17 20:54:34 UTC-04:008.0 km

  10. Oh! For goodness sakes Geo! You always turn up just when I am in the shower and my hair is all over the place!
    <<<<<<<<<<< Grabs her pink fluffy dressing gown and purple, sequinned slippers and shuffles off to get presentable.

    Phew ! That's better! Coffee #2 and I am feeling so guilty!
    Not because I am batting my eyelashes at GeoLurking. 😀 Not because my husband is off work for 4 weeks holidays due to him and I am thinking about how he disrupts my routine :D……. Not because I am OT……
    No! This morning I could not explain to Meg (Our gentle , loving, one year old Lurcher dog ) that we were taking her to the vet for an operation to stop unwanted puppies and false pregnancies. We know she will have a life without upsetting hormone induced behaviours but you cannot explain that to a dog. I have an irrational sense of guilt. Horrible leaving her there, but she will be back later this afternoon and be spoiled to bits.
    Poor thing! She couldn't understand why she had no "Good girl" biscuits or treats last night and no breakfast biscuits this morning. She knew something was up and I think she thought she had done something wrong. It's amazing how animals understand more than you think they do.
    It's a good job I will be very busy parcelling up the weekend sales this morning to take my mind off the quietness and lack of annoying puppy-like disruptions. 😦

    Oh! Sorry Carl…. Thanks for the post. It's certainly a volcanically busy corner of the world . When I have time I'll look for more info on google and You Tube & get to know it better.

    • Hope she recovers quickly without too much pain Diana. I also felt very bad when I took my poor dog to have various appendages removed. Couldn’t have done it if it hadn’t been a condition of re-homing the poor mutt. I will never forget the mournful looks I got from him. 😦 He now hates all intact male dogs. LOL. I also reckon he thinks he is married to hubby, if I sit next to hubby on the settee he will try to give me a gentle nip! Needless to say he ends up the other side of the door until he learns to behave. Then he will just sit with his back turned to me. 😀

      Karen, many thanks for giving me a new volcano to learn about. One I had never heard of too. 🙂

  11. I’d be curious to know whether the Aeolian Arc is expanding, along with Etna’s recent activity, and how this links in with mainland Italy which currently is active seismically up near the Alps and the French border.

    • Well done! I failed to find that even by searching on “Nachikinsky” and “volcanoes in Russia”.

        • just did a google search for the word Nachikinsky to see what I could see- and spotted it had come up as the 5th result, remembered that the article here said it wasn’t there so went and checked it out.

            • does make me wonder whether there is a search engine that uses all the other search engines and agregates the hits from google, bing etc and orders the results placing all the things that both found first and then all the things that only one of them found

            • There are a few search aggregators out there. How they specifically work depends on how they were coded.

              StartPage is an anonymizer, thought they do bounce off a few different engines (If I remember correctly)

              One of StartPage’s claims is that they don’t archive your search, so even if they get hit with a FISA warrant for data, there is no data to give.

              https://startpage.com/

              Now, do keep in mind that your search history will stay resident in your browser data, so if you have something to hide it will give up your data… that is if you have a warrant served on you yourself. StartPage is cool since I don’t have to worry about all those TiO2 and Carbonyl Sulfide searches getting the attention of some search algorithm working on an NSA database, queuing me up for further scrutiny.

            • Lurking, don’t worry, they have you on hard tap and bugs wired into the dogs. 😉

            • I don’t doubt it.

              I’m pretty sure that anyone who ever had anything close to a clearance it kept under observation at some level.

              Which makes you sort of wonder about those wayward entities that spill info for the sake of spilling info. I heard today, one bobble head questioning how Snowden could have had access to the info that he claims, with such a short employment, and only being 29. Yet the Manning critter allegedly has access to state department info, and no one bats an eye at how far down the totem pole his employment was.

              Sometimes stuff just doesn’t pass the smell test. What the “29 years old” bit has to do with it I don’t know. I was an E-6 by that age. Leading Petty Officer of my workcenter. Responsible for inventories, scheduling maintenance, and the last step at repairing stuff before you called in the hired gun. (Chief Petty Officer).

              29? To quote an old “lady”. “What difference does it make?”

  12. Two new SILs!

    For those who wondered why IMO was getting so stupendously nice solutions on those small deep quakes, here is the reason. They have two new Vatnajökull SIL stations. Kárasker is situated almost smack bang in between Öreafajökull and Esjufjöll. Húsbóndi is right ontop of the Pálsfjöll part of the Askja Fissure swarm in the southwestern corner.

    Perfectly on time for us to see all the action.

    Húsbóndi is a bit messy, I do not know if that is due to activity, or if it is placed in a noisy spot. Kárasker is nice and crisp though.

    http://hraun.vedur.is/ja/oroi/

      • Thank you Islander and Carl for the confirmation of the SIL’S, If I recall Carl, you predicted that an deep EQ was due around Dreki.

        Monday
        24.06.2013 13:37:27 65.025 -16.652 9.1 km 0.3 99.0 2.6 km WSW of Dreki

        Any chance for euro lotto numbers that win the top prize?

          • But something just ripped somewhere around Grimsvötn… A full 8 minute long event. Wonder where it hit and how deep. Looked large too. 2M I guess.

            • I can see the quake clear as glas, I have a feeling that IMO is spending time on separating the quakes.

            • Nah, it just the “Evil One” putting a chunk of Ice in his drink (“Magma” is the name of his drink, if one wonders) so perhaps an Hydro Event, possible precursor of nearby event but nothing still published by IMO (and no Harmonics playing tonight either)…
              so are you of opinion next event likely be Grimsvötn or East Zone?

            • Well, Grimsvötn is always a handfull… But, I am going for next deep quake being in the east zone (aka Askja swarm).

              Edit: Problem is that I am seeing that quake so clearly that I think it is just a case of IMO ponderification.

              Edit Mk II: It could of course be a Polarbear zipping on a Piña Colada will trying new shades. Always a lot of noise when that happens. (For newcomers, do not take things like this serious)

            • Me too!. Totally go for the Piña Colada too. Slurp. trouble is that Carl now has me on tenterhooks and I will have to keep checking back.
              The man should be ashamed of himself!!!
              Will he be? No chance. 😉

            • I am totally not ashamed of myself 🙂

              I am sitting zipping on a hot cocoa and watching mythbusters while waiting…

  13. Task for Carl.

    Define a box for Grimsvotn that would contain the magma chamber. I need west side, east side, north and south sides… then I need a minimum depth, and a maximum depth.

    I want to do an experiment to see what summing up the quakes would reveal as a wild arsed guess at volume increase from quake activity… assuming they are normal faults.

    • Hello Lurking!

      That was a fairly tall order. For several reasons.
      1. I know the constrainst for the known magmatic system, but that might not be one magma chamber, it probably contains more than one shallow chamber. They are though mainly within the 3-caldera system.
      2. The depth is poorly known for the magma chamber(s) due to lack of investigation and it being hard to make a tomography due to few places to put the equipment on. The reason we are getting more equipment now is that new Nunataks pop up out of the ice as it melts away.
      3. There is a likely hood of there being 2 or 3 magma chambers ontop of each other. Personally I think we have the same problem as with Askja, one shallow emergant chamber that is rebuilding after the last caldera event 10 000 years ago, another larger deep one between 12 and 15 km, and then we have a magma formation layer at 20 to 28 km depth. The top most chamber is between 2 to 5 km depth.
      4. And here comes the rub. If the earthquakes are within the caldera they would probably quite often be of the weird Bárdarbunga type since the caldera shape is of the same type, you catch my drift?

      Now wandering off to look at maps and other illustrious sources for the coordinates… Fervently hoping you are not asking for the Fissure Swarm instead of the Volcano.

      • 64°25′12″N 17°19′48″W centerpoint of the infered top most chamber, add 6 km and draw a circle, then make cube.

          • Just the one account. It even shows me as logged in with the correct avatar in the upper right corner. But the posts, they comes up with the purple thing.


            Think I found it. While looking at the edit screen, it showed the email address with an incorrect spelling. Correcting it fixes the Avatar.

            I blame the Java update that kept popping windows up for me to choose yes or no about their silly arsed toolbar, which I refuse to use. If I want the G/D tool bar, I’ll go out and get it, leave me the F alone “Oracle.”

            • And someone have found a miniaturize tag for WP… As if I did not feel old before… 🙂

            • It happened last week with me too. But now every time I enter the wrong e-mail address shows up. I’ve to correct it each time I open this page. (*hopes that clearing cookies helps)

  14. Tuesday
    25.06.2013 01:38:29 64.682 -17.481 5.2 km 2.8 30.63 5.1 km NNE of Bárðarbunga

    Carl, is this the one?

    Its very low quality, However the depth could change and for myself, not a good sign at all.

    Lucky I am listening to messa da requiem dies irae tuba mirum, now. This will help calm me down. 😀

    • Yepp, it’s that one. I guess it was impossible to get individual solutions for it. It was not a 2M, it was a multiple of smaller quakes with long period.

      Personally I am going for Queen and “I want to break free”…

      • was it not before 21:11 hrs last night per your comment Carl … ???
        … Rick refers to 01:38 hrs …
        *I am “Sturkell”-ed now …*

        • You are absolutely correct of course… I got timely confused since I am on an entirely different time then Icelandic.

          Ah, I get that feeling often after reading Sturkleton The Confuser. He is a genuine source of both befuddlement and discombobulation.

          • no prob, I whould have loved see what ripped, snapped or broke – My view is hampered on this but my curiosity is growing : Is Grimsvötn or the next-by sistem the one that is “charging” (charging as per before shooting).
            BTW thay at IMO / Hí are in news today, re Tjörnes FZ, they say there is need for relocationg a certain unbuilt plant and the Hospital, due EQ hazard. Thats rather new thinking, even for Iceland.
            http://www.visir.is/radlegt-ad-endurmeta-stadsetningu-kisilvers-og-spitala/article/2013706259967

            • Probably a whise decision since they should be expecting a 7M quake around that corner soon. There have historically been many there and to boot it off we also have the new movement pattern that has started on that mini-plate that hinges off on Theistareykjarbunga.

  15. Grrr… 3416 … ages look less intimidating in hexadecimal.

    .. hey, that gives me an idea. → H2SO4 … heh, it worked. the “sub” tag is usable in wordpress!

      • If that is in relation to the Bday thing, thanks, I’m about 30 minutes into being 52, but still can’t tell you how much Carbonyl Sulfide you get out of a specific quantity of magma.

        On a plus side, I did get my truck back and made a 200 mile service run yesterday. When asked by a guy at the site ‘I thought you just worked on printers”, I responded, “No, I pretty much work on anything.” It gave me a good feeling. (when you do a lot of printers, people tend to assume you are a one trick pony) Which I’m not. I’m the guy that a NOC or Helpdesk sends on site to help un-Fk a system. Think of it as an intelligent monkey. The only time that gets frustrating is when I’m waiting on the guy on the server at his end to do something, only to find out he was looking at a plant in the corner. One of the more entertaining parts of this job, is that one of the server managers has a really thick Spanish accent. When he starts talking IT to the end user, they get lost quickly and he gets frustrated with them. Me, I have a bit of Spanish (not much) under my belt and know IT, so I don’t get lost talking to him. I also have the temerity to stop him and ask him what he said if I didn’t quite catch a word. Most end users are timid when talking to the server guy.

        • Congratulations!
          Now I have a good reason for having a beer this evening, I will swing the bottle in your general direction! 🙂

        • Well, I have been having sleep issues. I think it is from not being on the road. Had a melatonin tablet last night to try and get my circadian rythem back in sync with daytime. About the time I was dozing off, my wife decided to wash the dogs (who didn’t want to be washed, so you know how that turned out).

          Today, I have to do some errands so that I can more adeptly deal with on site issues that pop up, and am cranked on coffee and B complex vitamins. I can hear massive thunder in the distance, so to me, it’s gonna be a good day.

          Yay me!


          For anyone thinking IT is a solid reliable job… be forwarned. Your inherent worth depends on your skill set, not by the paper hanging on the wall.

          IBM has axed nearly three thousand workers in Canada and the US, according to employee union Alliance@IBM, as its cost-cutting drive begins to bite.

          Big Blue has been laying off swathes of staff worldwide in the last few years as it attempts to drastically reduce its outgoings, periodically announcing “workforce rebalancing”, “resource action”, “consultation process” and other layoff euphemisms in the UK and across the pond.

          Personally, I operate as a “business” and subcontract my services. How long I do this gig depends on how well I do it. In other words, can I get on site in a timely manner and can I correct the problem? My area is about the size of the state of Connecticut, so I lay down some serious miles every year.

          • In IT myself GL, It has more states that H2O, I managed to get the code use on to the site too. Current is the word of the day in IT. Either your it or ain’t it. 😀

            Congrats on another year, may your capacitors be strong.

        • Happy Birthday GeoLurking! IT – now there’s a job. I work in parallel with our IT guys and it’s both fun one minute, frustrating the next; the boss of the department has great ideas but the implementation is lacking – because the company won’t give him the staff and resources he needs so it all turns out half baked. In my youth I wanted to go into IT, but I’m glad I didn’t. After I hit 50 the whole thing started to mess my head up. At 54 I know I’m past it: I switch on the PC, it makes a bleeping noise, call in the IT guys who show me my keyboard’s stuck under the monitor. At that point I threw in the towel! 🙂 I’ll stick to my audio-visual and information work. I know what I’m doing there.

          I think…..

          • To be honest, I come at IT from a different path than most. My initial training is on vacuum tube theory and troubleshooting analog circuits. (with a healthy run through synchros and servos). Lets just say that I see things a bit differently than most in this field.

            By far the most frustrating job I have done, is hanging off an antenna platform trying to remove a rotary coupler from a waveguide without dropping anything the 67 feet to the water. All while enduring 45°F winds inport Sasebo Japan. I did however, see one of the funniest things in my life there. The FCs were using the collimating tower to do some alignments on their target illumination radar. This radar has a pretty large dish and is used to “light up” the inbound aircraft so that the outbound missile can see and kill it. They slewed the mount and the beam swept over a second floor balcony of a building. A maintenance worker was carrying a box of dead fluorescent bulbs that he had just replaced. As the beam swept him, every dead bulb in that box lit up. He dropped it.

            All a fluorescent bulb needs to illuminate, is something to ionize the gas inside. High Voltage AC or Radio Frequency energy, the gas doesn’t care.

            Along the same thought. I fiddled around with RF and radio quite a bit. At one time, I had a “footwarmer” on the CB in my car. While fishing I was talking to the wife from down on the fishing pier. I told my stepson not to mess with my antenna because if he shorted out the antenna while I was on key, it could fry my amplifier. He didn’t listen and reached over and grabbed the antenna while I was transmitting. Burnt a nice little painful hole in the tip of his finger as my antenna arced into the really nice ground return path that he offered. I don’t mess with that stuff anymore. I used to repair and align radios for his friends, but no one in this are is willing to pay you what it’s worth. So I stopped doing that. I got rid of the amp since it’s use is illegal under FCC rules and regs. 4 watts max output power on that band with AM modulation… not the 250 watts that I was getting. On beam, I had an ERP up in the kilowatts range. Other neat RF tricks that I’ve pulled are receive only. Such as the time I put together a balancing network for a TV antenna, mounted it in vertical polarization on a 50 foot push up pole and was listening to security chase drunks around at the racetrack up in Atmore Alabama.

            Yeah, RF can be fun 😀

            My latest endeavor is a helical antenna I built with close to unity gain and a cardiidoid pattern for listening to aircraft on the scanner.

    • Congrats for reaching the B- stage Lurking ! Many happy plots.
      Do not over use CH3CH2OH (I know you don’t it was just to use your new cool trick).
      As they say in the Lords of the Rings – Many happy returns !

      • Good lord I hate Ethanol. It’s made for drinking, not driving around as a fuel.

        I’ve done some brewing just for the hell of it, made one fantastically nasty oat augmented beer one time. I can see why it was relegated to the bars along the warves back in the days of sail. Awful stuff. I have been toying with the idea of brewing a nice dark set next. I just need to clean up my carboy and get my gear together. Right now my air-locks are on a gallon of cider I’ve been working on, as well as some mysterious plum concoction that I haven’t got the guts to try yet. I’m still put off by how my lapin eukon lemmenjuoma turned out. My stepson’s girlfreing thought it tasted okay, but to me it had the aftertaste of paint thinner. (yeah, I know what it tastes like, don’t ask, it was an accident) My plans were to pass it through a miniaturized reflux still in order to save the alcohol, but I’m not sure yet. With a good reflux still and close attention to the temps, you can reliably pull 85% ABV on a single pass. Better if you are skilled at it. Essentially, a reflux still uses the technology of cracking towers to optimize the product quality. Hold the vapor head just above the vaporization temp of Ethanol and feed the condensate back into the reflux column and the quality of the condensate starts to go up. (discard the first few ounces since that is where the highest methanol concentration will be if it’s present in the mash. You don’t want that, methanol is poisonous, it comes off at 64.7°C, which is lower than ethanols 78.37°C, it its there, is will be in your first draw.) As long as you are not trying to char and condense the vapor off of wood chips, the methanol content should be quite low.

  16. Carl, as you mentioned, Grimsvotn went Caldera around 10,000 years back, and has since been in a phase of rebuilding, magma chamber growth, which results in gradually larger eruptions until it will likely create another caldera forming eruption. As many of us know, this is a pretty standard “cycle” for highly active volcanoes.

    My question, is where does that put Bárdarbunga?

    I’m under the assumption that Bárdarbunga is very similar to Grimsvotn, being a central Vatnokull volcano in a major fissure swarm almost directly over the hotspot.

    I would have to imagine that if Bárdarbunga is following a similar cycle as Grimsvotn, it would have to be further along in magma chamber rebuilding than Grimsvotn is, and is closer to reaching another caldera event than Grimsvotn is, right?

    • Bardarbunga has a huge caldera, 600 meters deep and up to 13km wide. Grimsvotn has 3 nested calderas, each of around 5km wide, but they are rather flat as probably eroded deeply by many frequent powerful eruptions like the one in 2011.

      Grimsvotn apparently, from tephrology, had a big VEI6 eruption some 8000-10000 years ago, in a extrenely ashy eruption, probably that’s the last caldera forming event.

      It seems having more and more eruptions and stronger and stronger.

      Bardarbunga has a different behavior. Mostly it had severely large lava eruptions but not so many explosive eruptions, and they do not seem that big. Also quite infrequent.

      Bardartbunga pathways seems to have solidified into solid rock. Grrimsvotn seems to be a permanetly open conduit for the hotspot fresh magma,

      What this means in terms of likelyhood of caldera forming events? I do not know.

      Other caldera forming volcanoes can be Kverfjoll, Askja, Hamarinn and Oraefajokull, in the nearby.

      From my own perspective, Oraefajokull seems a rather large crater than a caldera, but Askja seems really to be like a caldera and one resulting from violent eruptions.

  17. I wish GL an Happy Bday, and may you avert surprise attack from hairy dog (have you checked if any part of the bday cake be stuck by chance somewere on you behind?)
    *This duplicate comment is only to sneak in this link (below) and ask when will it give in and stop rize, or fall suddenly. Answering myself, It does not have to fall. It can rise and rize as units are very small (but some other station fall).*
    http://hraun.vedur.is/ja/strain/1sec/index.html

  18. Explains itself. Mostly. This is Hengill Volcano (or Krísuvík if someone prefers) 😉
    Landsbanki was responsible for “Icesave”

  19. Just so Lurking knows… The evil bartender told me that they had this whisky that was produced by two brothers in Scotland without anyone else working there. It was the most ludicruous whisky the bar had. So, I ordered it and waved it in your general direction (might have been toward Iwo Jima) and had a zip. After tasting pure JP-7 (Black Bird) fuel I willl for the next few weeks dream fondly about your hard cider.
    Have a nice birthday!

    • Someday, somewhere, somehow, I’ll get around your neck o’ the woods and carry a piece of our ‘shine and a come a’hollerin and may the world be a’sunder.

    • Want a taste of the weird?

      Normal whiskey is aged in charred oak barrels. I took some ethanol and aged it with charred maple. It’s not whiskey, but it has it’s own unique flavor.

      And if you want really bizarre. The next time you grill hotdogs, do it over cedar coals. (red cedar, that you know for a fact has not been chemically treated.)

  20. Thank you all. It’s good to be back on the road, and alive. Natch, I ran across two idiots that concided themselves to be the most important people in the world while driving. One cut me off with no warning, and the guy following him really really wanted to follow his lead. I eased up and idiot #2 fell right in behind me, and I could barely make out the bottom of his window in the rear view. Completing my pass, I put my blinker on and eased back over to the lane for the on ramp and let idiot #2 have the road so he could go play with idiot #1. I figure that they would work it out, or that FHP would discuss the issue with them. They were both headed down to the vicinity of the local FHP headquarters.

    Getting back to town, I stopped at a local service station that specializes in fried chicken. I don’t particularly like chicken so I had a couple of corn dogs. As I sat out front eating my corn dogs, I was looking at all the advert signs that they had plastered all over the stores windows. A somewhat humorus (to me) thought came to mind.

    Special! Boneless Free Range Chicken! They are not that hard to catch

  21. On fun things to brew I made a batch of meed last fall as it was aging over the winter i took a notion to toss it out the door (in the 6 gallon fermenter) during a nice cold snap 15 deg f after it turned slushy i strained the ice out then let it re freeze deiced it again .
    It has a nice smooth flavor and will put one on the floor after a flagon or two

    • I think that counts as an old welsh drink ‘metheglin’ which as I understand it was partially distilled mead

    • I do Eiswine every winter. It is apple wine that I freeze in zip-lock bags and filter.
      Comes up to 30 something percent and tastes beutifully of apples.

  22. OT: We have our national brand “Brennivín” (Burn-Wine) and Back-Death. No need translate the latter – it tastes more like US Navy JP-4 (less toxic than JP-7 “Blackbird” fuel) but leaves you with an smoking feeling next day, just like the real JP-4 does at lo level. Think F-4 Phantom burning copyous amounts of JP-4 – and you have East-Fjord Fog mixed with the ashes from Eyjo, Grimsvötn or Hekla. The fog be in your head!

    *Oh, this day appears becoming a bore. One single quake 4,6 R abeam Southern tip of Greenland (visible a BUR strain at 06:44) but then not much more of interest.*
    http://hraun.vedur.is/ja/strain/1sec/index.html
    http://earthquake.usgs.gov/earthquakes/map/

      • Not Askja, nothing actually, not even weather, its them snow clearing the roads up to Askja *there was RUV news at noon about there finally the roads there are open but parts of it up to Askja are beeing cleared. I bet not the explanation you expected!

          • I think so, it simply stops shortly before midnight. Think they mentioned snow trac was used to ferry tourists up to Askja Caldera, then today the Rioad administration was trying opening the road itself. Note, there was excessive snow there, unusually heavy.

  23. I don’t know if you could do an article on Askja but I find the volcano to be one of the most unusual with the lakes and the guessing game of whether it shall have an Explosive eruption or a lava flow.

    • I’ll take a swing at it.

      Askja is pretty close to one of the more dominant sections of the rift. To me, that indicates that it would be mostly basalt like magma. With the presence of the lakes, that could make for phreatomagmatic events with a lot of energetic lofting of material.

      I don’t find the Askja system as a standalone listing at teprhabase, but that does not mean that it hasn’t put material far afield. I may just be stupid, but I think someone mentioned that Askja has had andesitic magma, if so, that leans towards the more gassy eruptions. More so if it gets up into the rhyolite range in silica content.

      Irpsit or Islander can probably point that out if it is so. Carl also… he is wise in the habits of rocks. (Not to infer that a rock would wear a Habit, though I am sure that some Habit wearers have had a cold stony glare.)

      My take? Flow like unless the water gets involved…. unless the silica content says otherwise.

      Caveat: I’m just some aging guy in Florida and may not know what I’m talking about.

    • Hello!
      If you do a search you will find a couple of posts on Askja in here and there will be more sooner or later.
      Askja is a bimodal volcano. Normally it have small to large scale effusive eruptions of fairly standard icelandic basalt rich in tholeiitic olivine. These are absolutely non explosive except for contact with water.
      But, there are also a lot of pockets of old magma that have turned into rhyolite, and in the 1875 eruption hot basalt found one of those pockets and turned an effusive event into the most explosive in Iceland in 500 years.
      In short, an eruption outside of the caldera would be predominantly effusive with smaller explosive events if there is contact with water. If the eruption is inside of the caldera it would most likely be a small to medium sized eruption with some explosive components unless hot basalt remobilizes another pocket of rhyolitic mush.
      Then we have the small possibility that it would be a rifting fissure eruption of the Laki type and then all bets are off. Not likely though, next one of those will most likely be along the Veidivötn fissure system.

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