Earthquakes in Iceland, a short overview

I have seen a lot of people worrying about earthquakes and earthquake swarms that take place in Iceland on regular basic. Those worries are not needed as Iceland gets about one to two earthquake swarms on average over the course of one week. Most of the earthquakes that take place in Iceland are tectonic in nature. There are also volcano related earthquakes. But they can be spotted by there location in connection with the volcano in question (Katla, Grímsfjall, etc..).

The reasons for the earthquake swarms in Iceland is geological and is because Iceland sits on a rift zone. This can be shown clearly on this picture here.

Click on picture to get better resolution.

This map clearly shows all the zones in Iceland. In this areas most of Iceland earthquakes happens. But also a big part of Iceland earthquakes happen in areas like SISZ and TFZ.

On the normal week there are about 150 to 400 earthquakes in Iceland over the week. Most of them are in the size ML0.0 and up to ML2.8. Most week have one or two earthquakes that are ML3.0 to ML3.8 in size. On a quiet week there are about 50 to 100 earthquakes, most of them less then ML2.5 in size. When there is a busty week in Iceland the earthquakes numbers can easily go over 2000 and sometimes well over 5000 earthquakes. When that happens IMO doesn’t even bother in classifying and locating all the earthquakes that take place. But they are saved anyway in IMO database.

Picture taken from this blog: Earthquake in Iceland (2008); This blog has more images about the tectonic process in Iceland.

226 Replies to “Earthquakes in Iceland, a short overview”

  1. Some questions.

    There is this website about Hekla:

    I wonder what the graphs with this text over shows: “Leiðrétt þenslumælagögn frá tveimur stöðvum í nágrenni Heklu”

    And the graph with this text under: “Vöktun þenslumæla”

    Will any of this graphs show changes before Hekla is erupting?

    1. This is expansion data from deep hole pressure sensors that they have. If you get lucky and the scientists at IMO also get lucky. They can see the expansion (strain) of the magma chamber under Hekla volcano on those sensors before it starts erupting. So it is worth keeping a eye out for those sensors. But I must admit that it is really hard to read that data. This is the corrected strain data that you where asking about.

      When Hekla starts erupting we are going to get a short notice. A real short notice. How short it is going to be is going to depend on many factors.

  2. I just had a thought, I have been going on about the moon bottoming out on this new moon and the effects on earthquakes. The original reason I posted here was to have a good discussion on volcanoes.

    When the moon bottoms out it’s reaching the southern point, and then it start going to go north! Where’s Iceland? Where will the moon be next full moon? Next new moon? When does the moon top out? These questions should be at the back of your mind if you’re into this kind of stuff.

    Normally, I would not post here [given the hostile environment], it was only the conditions in the sky that compelled me to post something. The conditions are still there. Things should start getting interesting in Iceland.

    1. This is nonsense and the work of your imagination only. Next full moon is in 16.5 days time I believe.

      For the record. It is my opinion that people how spin something up have no business on wasting my time and others on imaginary “theories” on how the world works. As it takes good time from real science that are working with real data all the time.

      The Moon tilt on its axis is small, as they say on NASA “But the tilt of the moon’s axis is only about 1.5 degrees, so the moon has no seasons. ”

  3. Hi all…have been following this blog for a while now….great blog! thanx. I also follow all other earthquake and volcanism blogs…like u find it infantisimaly fasinating, we dont know what forces influence the timing of them and they all behave differently…We can speculate and we all do! as to their behaviour…keep up the good work…we might get it right occationally but not always…..I do feel though that althnough we have all the instraments……nature takes its own course
    Happy Hunting..xx

  4. can somebody tell me, where this uptick in the tremor-plotts comes from? the weather doesnt seams to bee that bad at all, or am i missinterpretting something? stronger tide causing the uptick in the tremor-plotts or is the weather indeed not that good?

    rise in red and green frequency on all stations near the south-coast of iceland, on the northcoast there isnt such a rise:

    1. This is just the wind. This wind might even be far away from Iceland and it still has a effect on the SIL stations that you list there. For that are many reasons, but for most part it appears only to be ocean noise that is the cause of this changes (waves that is, even deep one).

  5. Thanks for you answer, i know, its a dumb question 😉 but it was on my mind and i thought, bether ask a question than swallow it down and never know whats caused the uptick.

  6. Hvo has changed from its usual character, and I find it pretty weird looking. Any ideas on this?

  7. @Brians prediction above…

    Well your prediction about increased quake activity bummed out. How are you going to explain that we had pretty much an all time low on quakes when you predicted a high?
    And then you are quoting a lot of volcanoes erupting:
    New Zeeland = Old news
    Hawaii = Please… it is not erupting more than normal
    Philippines = Ah, Bulusan is active, well it is normal for Philippines. Is it the third or fourth volcano this year?
    Merapi = Yes, it is more active than since 1930, but it is still a small eruption relatively speaking. Compare with Pinatubo and Mt St. Helens. Laki was a real eruption 🙂 (The rest: Please note that I am in no way making fun of the victims of the volcano)
    Cameroon = Well that is a hoax generated at a 2012 site and originated out of a scam in Nigeria. Source? I am a board member of the company drilling into Mt Fako in Cameroon (Known as Mt Cameroon internationally). It happens nothing there that I wouldn’t be the first to know. FYI, we also assist in monitoring Lake Nyos and extract Methane from Lake Kivu.
    Sorry, it was a quite normal day geologically speaking, even low on the quake front.
    Such a splendid theory as yours, with that really unusual setting of planets and everything, shouldn’t it have generated something really nifty, like Mt Kirunavaara erupting after 6,8 million years to be credible 🙂

    Seriously please give up. The world is fantastic enough as it is in reality without inventing loads of crap.

    1. Re Camaroon.

      Is that the Oku Volcanic Field thing? I couldn’t find and SO2 bloom or thermal anomaly. With six alleged vents/spots you would think that something would show up.

      So it was a hoax after all. Go figure.

      1. Yes, it is Oku. Actually it is unusually calm in the area.
        There is only one volcano there and it shows only background tremor levels, a couple of week -2 quakes per day, no gas emissions other than the CO2 tapped from the lakes to prevent limnic eruptions.
        SO2 would not come from the lakes, and is even low when Mt Fako erupts so that is not unusual to not be evident.
        Yepp it is a hoax according to the onground geologist and mining engineers in Cameroon. And yes, even if it had been a brand spanking new volcano in Nigeria they would have seen it on the equipment quite well.

  8. I have an offtopic question, what’s the biggest interval between two eruptions of the same volcano ever proven?

    1. Good one, I guees Erik would be the one to answer that over at his Eruptionsblog.
      Jón, how about the Icelandic volcanos, do you know of the one with longest intermission?

      1. Toba is a supervolcano 🙂

        I did not want to take them into account, as their eruptive intervals are long by nature.

      2. That volcano is named Hofsjökull. It is not known when it erupted last time. But it was sometimes over 12,000 years ago far as I understand.

        However, there have been some fissure eruptions from it in last 10,000 years I think.

        Hofsjökull is a massive volcano with 7 x 11 km caldera.

        But then here is also this volcano. It is called Geysir and also has not erupted in historic times.

        This is the case for many volcanoes in Iceland.

  9. Jón, is the level of water discharge via Kolgrima normal, or might it be induced by Esjufjöll? Probably being stupid here… The released water doubled during the quake “swarm”.
    Second of all, is the tremors in GRF still wind-powered or is it the actual volcano tremoring?
    Thanks in advance!

      1. I think Poisonman ment which volcano took the longest break before erupting again.
        Didn’t Askja use to be good at napping. If memory and Global Volcanism Program serves correct it napped for 7000 years and then slept for another 3000 before getting active again in 1300? And then someone gave her Coffee 1875 and she went on a spree up untill 1961 🙂

      2. Askja is a stratovolcano that did go boom and blew it self up in the year 1875. But that eruption was a VEI=5 in size.

        Askja eruption history.

        Icelandic volcanoes always take a short to long breaks on regular basis.

        Last harmonic tremor pulse in Askja was in March 2010. It was followed by a swarm of small earthquakes at 20 km depth. So Askja is also getting ready to erupt in the future. When is a big question as always.

      3. If Fourpeaked could wait for 10000 years before popping, then, in the light of this, could even Herdubreid erupt in future?

        Can we absolutely say that it’s irrefutably extinct?

      4. @Poisonman below:
        Herdubreid has been fairly active with quite a few Quake Swarms and some tremoring during this year. I think the last one was in early september if memory serves. But the action was not directly under Herdubreid, it was under Herdubreidartögl. We had some guessing that it was a possible upcoming rifting coming, but nothing happened. I would not rule Herdubreid out.

  10. I’m very disappointed that Grimsvötn has deceived us all and decided to sleep a little longer despite unceasing rattle by earth tremors .

    However, it’s just a small aperitive before the main dish 🙂

    1. I still think it will be any day due to the really warped GPS-measurmens of GRF.
      East-movement is a nice steady line.
      South-movement have been steady, but all of a sudden made a sharp turn and GRF is now moving rapidly to the north.
      Upwards movement was steady up untill roughly 15 days ago, then it went berzerk with an uplift of more then 50mm, same timeframe as GRF has moved 40 mm north against “normal” movement.

      So, any day… this week, or next month… But my guess is that it will bopp before april next year, probably sooner than later.

  11. First Quarter 16:37 UTC 13 Nov 2010

    Moon 21h 29m 14s -10° 49.3′ 63.3 ER

    Sun 15h 15m 2s -18° 3.3′ 0.990
    Jupiter 23h 38m 36s -3° 55.0′ 4.353

    Full moon 17:29 UTC 21 Nov 2010

    Moon 3h 45m 38s +22° 48.9′ 61.1 ER

    Sun 15h 48m 18s -19° 59.8′ 0.988
    Jupiter 23h 38m 26s -3° 53.7′ 4.465

    Last Quarter 20:37 UTC 28 Nov 2010

    Moon 10h 26m 2s +4° 46.2′ 57.0 ER

    Sun 16h 18m 33s -21° 23.6′ 0.987
    Jupiter 23h 38m 59s -3° 48.2′ 4.570

    New moon 17:37 UTC 5 Dec 2010

    Moon 16h 47m 22s -24° 8.3′ 59.8 ER

    Sun 16h 48m 17s -22° 24.9′ 0.985
    Jupiter 23h 40m 6s -3° 38.9′ 4.676

    The higher the moon the greater the tidal forces, vector thing.
    The moon will top out some time near the full moon.
    Since the earth is moving towards the winter equiniox, the lowest southern point, exposing Iceland to highest angle of the moon when it tops out.

    The volcano activity will increase. The magma is moving and down. If the amplitude of the movement is getting bigger what happens? More local quakes or the quakes average a bigger magnitude or just both?

    This full moon is a practice run for the next full moon.

    The folks in the southern hemisphere should be a little concerned about the next new moon.

    1. Please just stop your mooning.
      It is so boooooooooooooooooring.
      You’ve been proven wrong so many times now that I would very much like it if you went to another forum with your moongrel moonastic moonacies.
      By the way, did you even read my sumary of your faulty predictions? Everything you said was wrong… 🙂

    2. Oh bloody hell… can the pseudoscience!

      Next you’ll be invoking Velikovsky…

      Jon, it’s you train set – but in my opinion it’s time to set some more ground rules for this blog.

      1. The ground rules have been set. I am just allowing this to play it self out there. Everywhere else on this blog and the comment in question get’s deleted and I won’t ask any questions.

  12. I guess Grimsvötn was just for Merapi to calm down.
    As soon the situation is under control in Indonesia, we’ll all fly back to our beloved Iceland.
    Good night!

  13. New moon was Sat 2010 Nov 6 04:52 UTC

    Hawaii – Probably no big deal, not sure why the wasted the time and effort to post something on their website. 9 PM Friday (HST?) would be 06:00 UTC Sat

    Volcanic energy remains high
    POSTED: 01:30 a.m. HST, Nov 07, 2010
    “According to the USGS Hawaiian Volcano Observatory, the deflation-inflation switch occurred about 9 p.m. Friday. The deflation phase had lasted three days, according to the observatory.”


    I found this interesting. Does the deflation-inflation process corresponds with the up and down motion of the magma that I talk about. In Hawaii, they can probably see it, whereas in Iceland, it is under a glacier? Monitoring that activity becomes that much more difficult? Are the quakes be used to somehow gauge that activity or some other activity?

    This is the first I have thought about the geology.

    1. This happens all the time in active volcanoes. What drives this forces is not tide. Because magma is more dense and more sticky then water.

      So the answer continues to be “no”.

      1. In Hawaii, “The inflation phase had lasted three days”. Is this like the magma level went down? And then the inflation phase starts to rise and it rises too much it erupts? Using the quakes to some how get a picture of this process without seeing it?

        Is the inflation phase in Iceland around 3 days as well?

      2. The eruption in Hawaii has been going on at least for year 1983. So, there have been ups and downs in the lava level many times. Try to invent something credible…

      3. I continue… mainly since you expressed an interest in something other than the esoteric.

        Jan Mayen is an island north of Iceland. 70° 59′ 0″ N, 8° 32′ 0″ W

        It’s also the only remaining peak of another continental block that remains above water.

        Continental crust is less dense than oceanic crust, and when the two collide, the oceanic crust usually gets subducted. Why the whole crust fragment of the Jan Mayen microplate is underwater is anybodies guess. According to a paper I read a few months ago, the Jan Mayen platelete, like Iceland, was jumbled up in the movement of a hotspot (technically, the hotspots don’t move, the plates move across the top of them) an the opening of the Atlantic Ocean. In the process, the Jan Mayen got turned several degrees and eventually was welded to the Eurasian plate. There is still activity at what is believed to be another hotspot on it’s northern perimeter, but you don’t see much press/paper about it.

        Personally… I think it’s a pretty neat side story to Iceland’s volcanoes.

      4. Not really, yes they are good graphs. But volcanoes are never easy enough to be represented in one graph.
        Take Lurking, the master of graph erotica for us dedicated volcanophiliacs, he made hundreds of stunning graphs of Eyja when she was bopping, and not even all of them told the entire story, we also had to look at video, tremor-plots, and heaps of other info.
        Beware of all answers that look simple, volcanoes are anything but simple.

    2. I second Jón’s response.

      But I would also like to add that Hawaii provides the best evidence of a phenomena referred to as a Mantle Plume.

      Mantle Plumes are far more widely accepted that arcane musings over lunar effects. But there is a contingency in the scientific community that have issue with their existence… or at least with the large number that are claimed to exist. You can read more at and see some of the arguments either way. There are some pretty good papers linked in over there.

      One site that has had the issue of it’s mantle plume questioned, is Iceland.

      Generally, it is believed that the plume under Iceland treked there though Greenland, and is currently parked under Bárðarbunga, the other dominant central vent volcano north of Grímsvötn. More recent research has stated that the magma from the Icelandic volcanoes doesn’t quite fit the chemistry of a deep mantle plume, and state a more shallow origin for it. Yet other research states that Iceland is composed of a chunk of continental crust sitting on top of oceanic crust. And odd configuration since usually they don’t exist in the same spot like a two layers of pancakes. This is given as a reason for the relatively thick crust… upwards of 40 km or so.

      Now… Hawaii. The Quake Plot. Open ocean. Middle of nowhere. Pure oceanic crust over a deep mantle plume. All quakes 2000 to 2010. Perspective plot looking North East.

      1. Ref the plot… “listed” instead of “listred”

        I was in a hurry to remake the plot and had a case of finger dyslexia.

  14. Solar flares trigger geological events? I have serious doubts when it comes to earthquakes. For volcanoes? Open to idea.

    For the spite of volcano activity that I claimed was the domain of the new moon might have been the first batch of solar flares? That would mean the second batch of more intense solar flares should trigger more [intense] volcano activity in a couple of days?

    Sun’s Northern Hemisphere Bristling with Solar Flares
    Published by Matt on Wed Oct 27, 2010 9:36 am via: NASA

    Sun Unleashes Most Powerful Solar Flare in Years
    By Tariq Malik Managing Editor
    posted: 08 November 2010
    04:02 pm ET

    1. Brian:
      Have you ever studied physics?
      Please go and do so. Why invent erronious theories instead of studying?

      I quick-calced (I did the math in my head, something you learn if you study for Prof Takeshi) and calculated the actual electrical effect on 10 kubic kilometre 20% iron magma chamber. I then subtracted the insulation effect of 2 kilometre of bedrock (basaltic), the atmosphere and the van allen-belt. So what did I get left after all these calculation (and googleations) of all the electron-force exerted on the poor volcano in question? Remember that we started with quite a lot of power. The total distributed effect would be around 100 watts in total. So if you would like to think that a large lightbulb has effect on about 45 million tonnes of magma, then feel free.
      I even for the fun of it calculated the neutrino energy release ratio since we are looking at everything, 0,0067 watts +/-5%

      Brian, give up for the love of your deity of choice!

      1. I have not studied physics past high school.
        I did not have a lot confidence about the solar flares when I posted about it. I thought I’d throw it out there, you seem like a smart and knowledgeable bunch.

      2. “I have not studied physics past high school.”

        You should have studied, as it would have saved you from believing all the crap.

    1. Oh.. nice.

      This doesn’t look too much like the large quake event further south on the Reykjanes. On that one you could actually make out the outline of a graben.

      Here is the plot of the Krýsuvík swarm. (perspective view, with crust and Moho)

      1. This is intresting as the Krýsuvík area has been getting warmer since the year 1999 and even earlier. This might indicate a magma movement at some depth there. But so far there is nothing indicating that there is going to be a eruption in the area any time soon.

        Other geothermal areas on Reykjanes have also shown signs of getting warmer over the past 10 to 15 years or so I believe. So for the moment there seems to be a increase in geothermal activity on the Reykjanes.

        But I wish that Iceland Review would connect to the news they report about. It would make my life a lot easier.

      2. Oh, I was not suggesting that we are heading for an eruption there.
        And I can confirm the observation, that the geothermal fields are getting hotter and more active. I specially know this for Seltún (which is actually the geothermal field in the Krysuvik area) and the hot spring Gunnuhver at the tip of the Reykjanes peninsula. Especially the last one got ways more active, so they had to close a road, that went nearby and relocate a viewing platform.

      3. Yeah… it would. But the plot gets busy fast and you wouldn’t be able to tell which one are which. I tried using different symbols before and they were misinterpreted as large quakes.

        So lets try this one. Made with Diva-GIS.

      4. I was more like thinking about a plot of Krisuvik with the quakes from the entire last week. In the former plot you just had one day.
        But it was a really nice plot of entire iceland 🙂

  15. Speaking of which, 20 years ago I (politely) stopped a man who was on his way out of the shop as I caught a glimpse of what looked like stolen goods on his body. It turned out he was into crystal healing. He told me he had taped quartz crystals on all chakra points and showed me those on wrists, crown and chest. I stopped the “show-and-tell” there and then as I had no interest in further confirmation, but it must have been very painful.

    Funny what people will believe. Worst thing though is that they seem to think that they have a RIGHT to have their utter nonsense given equal consideration by everyone.

  16. Wow, it seems like people have created \volcanoes\ here. I hope it’ll not be the same as the Lusi mud volcano in Indonesia… That too came from a borehole I believe.

  17. Quote: _”Wow, it seems like people have created \volcanoes\ here.”_

    Created? During prospecting for oil and/or natural gas, the drill went through a layer of highly pressurised alluvial deposits which set off a natural fault. The pressure was enough to cause the “mud volcano” and certainly, had the prospecting hole not been sunk, there would not have been an eruption of mud. But man did not _create_ that mud volcano! It’s one of the hazards associated with our “need” to get to and from work in a timely, weather-protected manner, have food delivered to our local supermarket etc. 😉

    1. I see your point. I just meant that if man had not drilled there, the mud-volcano would probably not have been there… 🙂

      For that matter, I don’t think humans can create real volcanoes.

  18. Old Geothermal Borehole in Krýsuvík Bursts
    Those who have visited the geothermal area Seltún in Krýsuvík lately have noticed that geothermal holes that were drilled in the 1950s have become active again.

    From Krýsuvík. Photo by Eygló Svala Arnarsdóttir.

    Ómar Smári Ármannsson who passed through the area recently told Morgunbladid that clay burst out of one hole after it began snowing last week and loud thuds near the hole indicate that it might burst again.

    The hole has been fenced off but Ármansson said it is necessary to take further security measures as Seltún is among the country’s most frequented tourist attractions. Not long ago there was a steam explosion in another borehole in the area.

    In October 1999 one of these holes exploded loudly. Mud spread as far as 700 meters and the hole formed a crater measuring 43 meters in diameter.

    A shed located 100 meters from the hole was damaged in the explosion; windows were shattered and a large rock fell through the roof. … _id=369922

  19. Someone above mentioned that the ICE was the reason for the sudden changes in the location of GRF.
    Odd thing though is that the changes I was refering to somewhere above has happened after ice-clearing.

  20. Tuesday
    09.11.2010 07:49:10 63.566 -19.199 5.3 km 3.1 32.47 5.1 km WSW of Hábunga and under the south end of Mýrdalsjökull glacier.

    This is like… a quality of 32.47. Another miss by the automated systems?

  21. Wonder why it’s not getting corrected. It remains at the low quality, just like some other recent 3+ EQs at Myr.

  22. @Reynir, thanks for keeping us posted over on the hot side! Need some nice cold Icelandic weather as a break from all the action of the past days in Indonesia…

      1. I think birdseye was thinking that Reynir had found the news on Grimsvötn being “de-classified” here, something he posted a while ago back on EB.

  23. I found this graph interesting for the volcano with the activity in Apr.

    If you could overlay a sine-curve on the graph at the bottom, that would approximate the “tide of the magma”? The distance between the peaks would be length of the tide. The oceans have two high tides a day, the “geo-tide”, I would expect it to be somewhere around monthly or semi-annually but really it’s anybody’s guess at this point.

    That graph is couple days old, is there one that is updated? The activity should be minimal right now till First Quarter 16:37 UTC 13 Nov 2010. And then it pick up a little bit.

    The graph does not indicate a lot of activity and I can see why you may be incredulous at my claim this will be a practice run for the next full moon. It still is, the activity this new moon will not be as much as the next full moon. I think Iceland will be spared this round based on that graph. If the moon was topping out at the new moon, it would be different. The Southern hemisphere should see the activity.

    I was wrong when I stated Astrology = Astronomy – Geology
    As I just found out, really it’s Astrology = Astronomy + Geology.

  24. Staöarsraör area. One visitor of the RSOE EDIS – Martijn Eijbersen from Rotterdam – observed a geological activity on a NASA satellite RAPID FIRE system’s photograph on 10/11/2010. We’re waiting for confirmation currently, which confirms the possibility of volcanic eruption. A NASA systems satellite image link and the photo is attached.

    NASA RAPID FIRE photo url

      1. Ok, this is on Snaefellsnes, the Google earth position is: 64.825000° -23.119350°, the area is called Staðarstaður. Not really an active volcanic area, although it has a dormant volcano nearby: The Snaefellsjökull.

  25. “The activity should be minimal right now till First Quarter 16:37 UTC 13 Nov 2010. And then it pick up a little bit.”

    Merapi volcano expected not to show dramatic change in 3-4 days
    16:23, November 11, 2010

    Indonesian President Susilo Bambang Yudhoyono said on Thursday that Mount Merapi in Central Java is not expected to show dramatic change in three to four days.

    “Based on reports I have received, situation is not expected to show a dramatic change. The mount does not show signs of (eruption) receding either,” Yudhoyono told a press conference.

  26. This may not make to the new moon?

    Iceland is not see much activity?

    The magma pool is only so big and it appears it is bulging in the south.

    Bulusan Volcano remains restive; Alert Level 1 still up — Phivolcs
    November 11, 2010, 2:18pm
    MANILA, Philippines (PNA) — The Philippine Institute of Volcanology and Seismology (Phivolcs) said on Thursday Bulusan Volcano in Sorsogon remains restive and Alert Level 1 is still hoisted.

    Phivolcs said Bulusan Volcano’s seismic network detected a total of 17 volcanic earthquakes during the past 24 hours.

    Wednesday’s measurement of sulfur dioxide emission rate yielded an average value of 135 tons per day.

    Moderate crateral emission of white steam reaching up to 150 meters above the crater was observed drifting east- northeast.

  27. This is older. How accurate is this?

    There’s 3 volcanoes, is there links for all 3 graphs?

    Another Iceland Volcano Under Watch
    By Andrea Thompson, LiveScience Senior Writer
    posted: 19 April 2010 05:33 pm ET

    “There is some possibility that the connection between the eruptions of the two volcanoes is more than coincidence, because there is a sort of give-and-take relationship between the magma chambers that feed each volcano. Volcanoes explode because the pressure of the magma building up in the chamber forces it out, which then relieves the stress in the chamber; but what relieves stress in the one chamber could increase stress in a neighboring chamber. For now though, scientists don’t know what might relate the two volcanoes.

    Hekla is farther away from Eyjafjallajokull than Katla and is “probably the most active volcano in Iceland,” Miller said. So if it happened to go off soon, it would likely be coincidence.”

  28. Here is a picture of the ocean tide for somewhere for a day. It’s a good example of the tide curve.

    It describes the expected volcano activity for the the lunar cycle.

    The green region that goes from 2 to 11 (X-axis) describes the activity from the new moon to first quarter.

    The blue region that goes from 11 to 16.x describes the activity from the first quarter to the full moon.

    The green region that goes from 16.x to 22.x describes the activity from the full moon to third quarter.

    The remaining blue region wraps around and describes the activity from the third quarter to the new moon.

    Old news?

      1. maybee the post eating monster will show up eventually and get rid of some tasty junkfood 😉

      2. Thankfully he can only post here for 60 days. After that the comments gets archived and closed automatically.

        I have already hidden a nonsense comment from him in a different blog post. It is waiting deletion by me.

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